




Date: Tue, 26 Apr 94 02:14:29 ADT
From: Shmuel Weidberg <shmuel@io.org>
Subject: Re: interesting,complicated

On Tue, 26 Apr 1994 MJNAUGHTON@amherst.edu wrote:

> Hi Shmuel!
> "Interesting and complicated" is a matter of taste, I guess, but John
> Montroll's books (especially "Origami for the Enthusiast") and Kasahara's
> "Viva Origami" are two I would recommend. . . .
> Mike "I couldn't figure them all out, myself!" Naughton
>
Oh did I mention that they also have to be actually possible to make?
I have come across too many models that weren't possible to make - either
that or the guy didn't know how to give directions.
Now let's see if I can find those books.

--------Shmuel Weidberg, Toronto, Ontario-------------------------
If you think you might know somebody who knows me, drop me a line.





Date: Fri, 22 Apr 94 18:50:45 ADT
From: Soylent Green <rhudson@yorkcol.edu>
Subject: Re: Orikata

Sheldon:

A-ha!  I never specified the appropriate uses clause for Origami.. once the
model has been made and classified, its uses are limitless... Hypothetically
that paper knife could be used either as a butter spreader or as a rigging for
an automatic milking machine, despite the fact that it could become soggy and
cause an accellerated progres.. the point being that what you do with the ends
doesn't have to do with the means.

or something.

Rob





Date: Fri, 22 Apr 94 21:20:56 ADT
From: CHAPBELL@delphi.com
Subject: The Divine Cut (Math)

Dear Tom, et alia,
    The five/four-fold 3/4 problem took me a while, but I enjoyed it very
much.  Now, in this month's _Mathematical Intelligencer_, there's a very
interesting article about how the architect of the Florence Baptisery
designed the octagonal designs on the floor.  Using a compass, the author
shows how to describe the Divine Cut on the square (that's a tic-tac-toe
board with a ratio of (sqrt(2)-1):1:(sqrt(2)-1) on each side.  If you
connect the ends of the lines of the tic-tac-toe board, you get an
equilateral octagon.  Then, more squares and octagons are
inscribed inside.  Interesting, nigh mystical process.  However, being a
folder, I couldn't help thinking if this Renaissance man simply picked up
his blueprint and practiced a bit of origami, he'd have solved his problem
much more quickly and easily.  Can you figure how?  (Hint: eat a fly to get
in the mood.)
    Yours,
    Philip Chapman-Bell                  "`Normal' has no moral meaning."
    chapbell@delphi.com                               -Deacon Blues





Date: Sat, 23 Apr 94 14:14:45 ADT
From: Marc Vigo i Anglada SIG-LiSI <marc@turing.upc.es>
Subject: Sant Jordi!

Hi Luisa.

   I know Vicente  Palacios has published  origami books,  but I don't
know  him personally.  I also know there are  two diferent origamists
associations in  Spain one in  Madrid  and the other in  Zaragoza (but
none in Barcelona!), I've found their adresses in the database.
Which one publishes the booklet?

   Thanks for answering my mail and beeing worried about the fact that
I don't know many origamists.

                     Marc Vigo.





Date: Sat, 23 Apr 94 17:10:06 ADT
From: "Tan M. Lee" <tl1f+@andrew.cmu.edu>
Subject: Disney Characters

     Hello all,
     Has anyone ever seen or folded models of Disney characters?  If you
have, please let me know.  Thank you.

     Tan Le
     The Origami Club of Pittsburgh-University Chapter





Date: Sat, 23 Apr 94 17:40:21 ADT
From: Soylent Green <rhudson@yorkcol.edu>
Subject: Butterfly bomb!

I was finally able to assemble this beast, with the help of Gay Merill Gross'
"Art of Origami" using the Thoki Yenn idea...

I have butterflied!

Rob





Date: Sun, 24 Apr 94 13:11:21 ADT
From: Brian Ewins <gapv64@udcf.gla.ac.uk>
Subject: Re: RFD: rec.crafts.paper.misc. (newsgroup)

Hi,
        I'm having some difficulty monitoring discussion on
this on Usenet at the moment (discussion takes place in news.groups)
since our feed has been down for a week now, and I'm having
to grab news items from a German site...
        Anyway, there seem to be 2 main points of discussion:
1. Should it exist at all ?
Well, that's what the vote is for. I thought the noises here
were fairly positive last time it was discussed but there has
been some dissent; as I say, the vote is there to decide this.
Someone asked if the volume of discussion was worth it; I think
so, not just because of what we currently have on the list,
but because we have so much _without_ a Usenet group - traffic
is bound to increase as Usenet brings wider awareness of our
discussions.
2. Name should be rec.crafts.paper, not rec.crafts.paper.misc.
The reasons why I proposed r.c.p.m are in the RFD; basically
it was to make any later split in the hierarchy easier. In
answer to a point Bruce made, no, this was not the suggestion
of Dave Lawrence; I asked if this was the right title to go
for, and was told this was ok, but it should be discussed
(I mention discussion of the name specifically in the RFD).
I'm happy with rec.crafts.paper - any feelings about this?
I wouldn't be comfortable with rec.crafts.origami, because
it shuts out discussion of, eg paper making .

        see ya,
               Baz.





Date: Sun, 24 Apr 94 14:03:54 ADT
From: sea@umcc.umich.edu (Steve Arlow)
Subject: Re: RFD: rec.crafts.paper.misc. (neswgroup)

> Someone asked if the volume of discussion was worth it; I think
> so, not just because of what we currently have on the list,

Good lord, yes! This is too much traffic for a mailing list, IMHO.
The mechanism by which one reads and participates in a mailing list is
quite different from that of a newsgroup -- and far more
inconvenient.  For example, the discussion of computer-modeling of
folds: this is a topic I've been kicking around in my head for a long
time.  But sorting out those messages, reading them, and responding in
anything like a timely fashion?  Not on a mailing list.  A threaded
newsgroup would be *far* preferable!

> I'm happy with rec.crafts.paper - any feelings about this?

If it's less controversial, let's just stick with "rec.crafts.paper".

oh deride not / the camel / if grief should / make him die /|   Steve Arlow
his ghost will come / to haunt you / with tears / in either | Yorick Software
eye / and the spirit of / a camel / in the midnight gloom / |sea@umcc.umich.edu
can be so very / cheerless / as it wanders / round the room | (810) 473-0920





Date: Sun, 24 Apr 94 17:43:48 ADT
From: Shmuel Weidberg <shmuel@io.org>
Subject: Re: RFD: rec.crafts.paper.misc. (neswgroup)

>I wouldn't be comfortable with rec.crafts.origami, because
>it shuts out discussion of, eg paper making .

This is a pretty heavy newsletter without topics such as paper making. I
would think if you wanted discussion of topics like paper making it could
be in its own news group.

--------Shmuel Weidberg, Toronto, Ontario-------------------------
If you think you might know somebody who knows me, drop me a line.





Date: Sun, 24 Apr 94 18:09:27 ADT
From: Brian Ewins <gapv64@udcf.gla.ac.uk>
Subject: Re: RFD: rec.crafts.paper.misc. (neswgroup)

| From: Shmuel Weidberg <shmuel@io.org>
| >I wouldn't be comfortable with rec.crafts.origami, because
| >it shuts out discussion of, eg paper making .
|
| This is a pretty heavy newsletter without topics such as paper making. I
| would think if you wanted discussion of topics like paper making it could
| be in its own news group.
There is some overlap between the topics; after all, what do you use
the paper for? I've noticed that there are some paper makers here already.
It's much easier to filter for the stuff you're interested in in a newsgroup
anyway.
        Is there strong feeling on this? It looks right now like I'll be
putting out a 2nd RFD with the title changed to rec.crafts.paper (having
read all the comments on news.groups) - a charter change is possible too,
but I'd be more likely to change it if people really only want to discuss
origami on the group.
        Remember, the narrower your constituency, the less likely you
are to pass the vote. This is _not_ a certainty.
| --------Shmuel Weidberg, Toronto, Ontario-------------------------
| If you think you might know somebody who knows me, drop me a line.

        Keep your opinions coming!
               Baz.





Date: Sun, 24 Apr 94 21:37:39 ADT
From: CHAPBELL@delphi.com
Subject: Whoops! The Divine Cut Again. (math)

Dear All and Sundry,
    Of course, I mixed up the proportions on the blurb on the _Mathematical
Intelligencer_ the other day.  Here are (I hope) the correct proportions:

    |  |  |  |1
    |__|__|__|
    |  |  |  |sqrt(2)
    |__|__|__|
    |  |  |  |1    And the question is, how do you make the
    |__|__|__|     Divine Cut with a simple origami fold?
     1  s  1
        q
        r          Sorry about that, chief.
        t          <>Philip Craig Chapman-Bell<>
       (2)         chapbell@delphi.com





Date: Mon, 25 Apr 94 23:28:35 ADT
From: MJNAUGHTON@amherst.edu
Subject: butterfly bomb

Agnes Tomorrow asks "what's a butterfly bomb?"
A "butterfly bomb" is technically (according to Magnus Wenninger, in
"Polyhedron Models" -- now, alas, out of print) a "rhombicuboctahedron".
cube with an octahedron) with the triangular faces "pushed in" (in other words,
     the square faces are flat, but the triangular faces are triangular
     pyramidal holes).  I hope I haven't confused you too much! - the
     cuboctahedron has a surface
composed of six squares and eight equilateral triangles, and it should be
pretty easy to find a picture of it, since it's one of the Archimedean solids.
[oops! I checked, and Wenninger calls it the "cubohemioctahedron" -- what WAS
I thinking!]
    Anyway, once you have the shape in mind, the next question is how to make
it.  Construction is tricky, but you use 12 modified waterbomb bases --
actually, they are just waterbomb bases that have only ONE bookfold (not the
normal two).  This gives a module which, if you laid it flat, would have two
large isosceles right triangles (each being a quarter of the original square)
quand four smaller ones (each being an eighth of the su
and four smaller ones (each being an eighth of the square).  Use one large
triangle from each of four modules to form a flat square face (the triangles
     will interlock in an "over and under" fashion, with the triangular point
     of one
module corresponding with a corner of the original square meeting the right
angle of the next module (corresponding to the middle of the original square),
and so on. (This is probably clear as mud, but it's the best I can do!)
     Once those four are interlocked, use four more modules to form the
inverted triangular pyramids (each new module links with two of the original
four, and the sloping sides of the pyramids are formed by the book-fold creases
in the modules).  Again, it's over-and-under.
     If you get that far, it should be fairly clear how to use the final four
modules to form the next set of four pyramids, finish off the four squares
you formed in step two, and finally complete the last square face.
     Hope this helps, at least a little -- maybe someone else can do a better
job!
Mike "Stretching the boundaries of the printed word" Naughton





Date: Mon, 25 Apr 94 23:45:09 ADT
From: MJNAUGHTON@amherst.edu
Subject: butterfly bomb-ball

Re Lisa Hodsdon's comments - I like "bomb" myself, since it DOES explode.
"rhombic dodecahedron"? I guess I've never really figured out how people
come up with these names!
As for the inventor, it may be Ken Kawamura -- Bill Dallar would certainly
know, as he has become the popularizer par excellence of the butterfly
whatchacallit.  Since it is based on the waterbomb base, however, it's
possible that the original inventor was Robert Neale (since he seems to
have done everything else possible with waterbomb bases, this seems like
a likely theory!).  I think he may have come up with it years ago and
considered it a failed attempt, since it really doesn't hold together
very well (I once heard him refer to the butterfly bomb as a "brilliant
presentation of a flawed model").  Along those lines, he also pointed out
that you can also make one "inside out" -- by which he meant, use twelve
preliminary bases to form a stellated octahedron.  It also doesn't hold
together very well!

By the way, I think you asked a while back about origami and geometry -- Tom
Hull is certainly an expert in this, and I think "Origami Omnibus" and "Ori-
gami for the Connoisseur" both have sections on the subject (as do some of
Tomoko Fuse's books).  You mentioned Wenninger -- his "Polyhedra Primer" is
Tomoko Fuse's books).  You mentioned Wenninger -- his "Polyhedron Models" is
certainly a classic, but I also like Peter & Susan Pearce's "Polyhedra Primer"
(also, sadly, out of print).  I've also done some investigations myself, as
yet mostly unpublished. . . . (except for handouts at FOCA conventions)
Mike "Good Lord, not another cubohemioctahedron!" Naughton





Date: Mon, 25 Apr 94 23:49:02 ADT
From: MJNAUGHTON@amherst.edu
Subject: butterfly bomb

Thanks, Mark!  One picture is worth a thousand words!  And thanks for the
correct spelling of Ken's name.  One small quibble -- it is NOT technically
made from waterbomb bases, since it is MUCH easier to put together if you
only use ONE book fold (I don't know if Gay makes this clear! :-}
Mike Naughton





Date: Tue, 26 Apr 94 09:44:26 ADT
From: Marc Vigo i Anglada SIG-LiSI <marc@turing.upc.es>
Subject: Pterodactyl

Hi.

I have drawn an origami model with 'xfig', just to try it. Although it
is very simple, i've spend 2 or 3 hours, because i had to export it to
PostScript and some things changed (text wasn't well placed, lines
didn't match, etc.). I will send it to Brad in order you can have it.

Have a good folding time!

                          MARC V.





Date: Tue, 26 Apr 94 13:03:55 ADT
From: LHODSDON@smith.smith.edu
Subject: Polyhedra books

Peter and Susan Pearce's book "Polyhedra Primer" is currently available
(along with a number of other good solid geometry books and many, many
good mathematics education materials) from Dale Seymour Publications in
Palo Alto,CA  (Unfortunately, I can't compute at home or office so I never
have references with me when I do this.  Dale Seymour has an 800 number
which should be listed in the 800 phone directory if you're lucky enough
to have one of those.  Maybe one of the teachers out there has the number
at hand?)

I believe they also have Wenniger's _Polyhedral Models_ and _Poly. Models
for the Classroom_.  They do sell wonderful posters of all sorts.  Last
time I looked they had _Unit Origami_ (Fuse?).  And if you like pattern
blocks and Cuisenaire rods like I do, there's plenty of other things to
drool over (don't drool on your origami, tho!)

About the Butterfly Bomb, Bill Dallar attributes it to Ken Kawamura.  Now
that I have heard the name, I realize what a fool I was to have forgotten...

-Lisa
lhodsdon@smith.smith.edu
(That's Smith College in Northampton,MA)





Date: Tue, 26 Apr 94 13:54:43 ADT
From: GURKEWITZ@WCSUB.CTSTATEU.EDU
Subject: RE: butterfly bomb-ball

Mike,
    The butterfly bomb is a cuboctohedron which is different from a
rhombicuboctohedron. I've taught both at FOCA and have a book in progress
with Bennett Arnstein on Origami Polyhedra.
     The cuboctohedron has six square faces and eight triangular faces.
On the butterfly ball the triangular faces are indented.
     The rhombicuboctohedron, on the other hand, has 18 square faces and
eight triangular faces. You can visualize it in several ways. 1) Three
rings of eight connected squares that intersect. A ring goes in each
of the three dimensions x,y,z. There are triangles between the rings.
     The book that I find most useful for reference is an old Wenninger
book on polyhedra published by National Council for Teachers of Mathematics
around 1976. It has one page of pictures of all the Archimedian solids, so
is good for quick reference. Wenninger's Polyhedron Models book has the
models spread throughout the book. I also have hanging in my house, some
framed posters of polyhedra that I got from Dale Seymour Publications. They
cost around $13 for two posters.
     If there's anything I've contributed to origami, it is to get Foca
people to know the word cuboctohedron.
     I'm waiting for a response from a publisher any day now. I think that
the polyhedra is a major connection with origami and math. Our book pushes
has directions for many more polyhedra than you might be aware of.
     There is a large literature on polyhedra properties since they have
been part of the math education curriculum for over 20 years. That's how
I got into them, I sat in on a colleague's math lab course. Then I thought
it would be neat to do them out of origami.
     Origami Omnibus has a section on polyhedra, but the directions are
not that clear if you don't realize that you have to make the polygons
that are the faces of the polyhedra from different sized square. This
is because the edges of the polygons have to be the same length for
them to fit together to make a polyhedra.
     Of course, Tomoko Fuse's Unit Origami has a catalog of polyhedra
on the back cover, and many of her modulars are based on the polyhedra.
     I teach origami inservice courses for teachers.
     I also teach origami as part of the pre-service math class student
teachers have to take at our school. I'm planning to introduce a *Math
credit* course involving origami polyhedra and maybe some other things
probably next spring or maybe the following fall.
     I think that I'm one of the few American math faculty that has
supported origami on the college level for 20 years and have decided
to develop it further because different influences are coming together
now to support it.

I guess that's enough for now.

Rona Gurkewitz
Associate Professor
Math and Computer Science
Western Connecticut State University





Date: Wed, 27 Apr 94 11:40:59 ADT
From: mkfire@aol.com
Subject: Where to go in NY City

I am going to be in New York City  in the next few days.  Although I am a
Friend of Origami member and Have sent in my application for the convention,
I don't know if there is anything to see at their headquarters??  Any origami
exhibits, etc.  Is it worth a trip to the Museum of Natural History to  check
out?????e





Date: Wed, 27 Apr 94 12:47:08 ADT
From: Agnes Tomorrow <atom@u.washington.edu>
Subject: Re: Where to go in NY City

On Wed, 27 Apr 1994 mkfire@aol.com wrote:

> I am going to be in New York City  in the next few days.  Although I am a
> Friend of Origami member and Have sent in my application for the convention,
> I don't know if there is anything to see at their headquarters??  Any origami
> exhibits, etc.  Is it worth a trip to the Museum of Natural History to  check
> out?????e
>

        It's worth a trip to the Museum of Natural History just to visit
the museum, regardless of the origami connection!  So you're not into
dinosaurs?  How about rocks and minerals--much more interesting than I'd
have thought!  Or native cultures.  Or--well, it's huge, and there's
plenty enough to occupy at least a week--  And last time *I* was there, I
was able to make an origami connection as well...

Agnes Tomorrow
atom@u.washington.edu





Date: Wed, 27 Apr 94 12:52:51 ADT
From: Sheldon Ackerman <ackerman@dorsai.dorsai.org>
Subject: Re: Where to go in NY City

>
> I am going to be in New York City  in the next few days.  Although I am a
> Friend of Origami member and Have sent in my application for the convention,
> I don't know if there is anything to see at their headquarters??  Any origami
> exhibits, etc.  Is it worth a trip to the Museum of Natural History to  check
> out?????e
>
Nothing wrong with visiting the Museum or the Planetarium. There are other
things besides origami :-)

 >>><<<Sheldon Ackerman>>><<<
>>ackerman@dorsai.dorsai.org<<





Date: Wed, 27 Apr 94 13:21:39 ADT
From: LHODSDON@smith.smith.edu
Subject: Re: butterfly bomb-ball

I started the rhombicuboctahdron misnomer, sorry...  I should know better.

Rona-- If I get a job teaching in Western CT next year, can I take your
course??  If I get a job teaching somewhere else, can I find out what
you are covering????

Why don't we have more mathematics classes offered in this stuff????

-Lisa
lhodsdon@smith.smith.edu





Date: Wed, 27 Apr 94 14:03:42 ADT
From: GURKEWITZ@WCSUB.CTSTATEU.EDU
Subject: origami polyhedra and math course

Lisa,
    You'd be more than welcome to take this course, and I'll be glad to
share what I'm going to cover. One of the reasons this course hasn't
taken shape yet is that there is so much material to sort through and
so many different focuses that one could give the course.
    I'm thinking of team teaching the course with one or two other
people.  I've collected some exercises, but am not sure how a complete
ly uninitiated folder would respond to them. I've thought of presenting
a fold and then give a problem to be solved from a geometric understanding
of the fold. Like, I have this neat box by Jean Paul Latil of Foca. You
start with a 2 x 1, fold it into a box that is square and its height is
one quarter of its area. Now, understanding the process, start with
what ever shape you want and use the same process to construct a cube.
(Oh yeah, there is paper that locks together to form a lid for the box)

It's kind of directed creative folding that I would consider 'problem
solving' in mathese.

As another activity, I've collected some interesting line drawings, but
and the problem would be to fold the decorative crease pattern without
using a ruler.

I have two people interested in working on this course. One is expert at
doing and teaching interesting things about the connection of polyhedra
and crystals and group theory. So I would do math connected with constructing
polyhedra and he would do crystals and group theory with the finished models
All this at the 100 level course.

Another fellow from a sister school was visiting and saw my display in the
hall (Can't say enough for getting out there and exhibiting) and liked
what he saw. He's an art professor that's into computers and math and
he says that he taugh the beginning design class using only paper, and
'found' paper at that. Before he taught the course with paper, the materials
cost over $100. With paper I guess it was much less. Anyway, he's interested
in putting together a math and art class that would be paper craft based
and would include origami. We haven't gotten too far except to think
it's a neat idea. There's a long development of math and art materials,
but what would be different about what we'd do, is that we would have
both art and math students do *both* art and math, not just study art
or math history.

Don't know what it's like at your school, but while many people here
are interested in origami, I haven't found anyone in the Art department
supportive.  What I've heard is that the attitudes of Art de
partments
toward origami is likely to change since more value is being placed
on women's art forms and art forms from different cultures which
includes  'crafts'. Otherwise I think there's a bias against things
that are not mainstream 'fine art'.  To be a faculty member in Art
you need an MFA and I never heard of any MFA in crafts. Anybody
know of one.

Bye for now.
Ron
a





Date: Thu, 28 Apr 94 00:27:28 ADT
From: MJNAUGHTON@amherst.edu
Subject: interesting, but possible!

Hi Shmuel,
    Good luck!  My favorites are the Stink Bug in Montroll's "Enthusiast"
and the
and the "Peacock" and "Demon" in Kasahara's book.
Mike Naughton





Date: Thu, 28 Apr 1994 00:59:55 -0300 (ADT)
From: Shmuel Weidberg <shmuel@io.org>
Subject: Re: interesting, but possible!

Are there any folds posted that don't require postscript. Is there a
small program available that prints postscript to the screen? What are
the names and locations of some interesting models available via ftp or
some other way? Thanks in advance.

--------Shmuel Weidberg, Toronto, Ontario-------------------------
If you think you might know somebody who knows me, drop me a line.





Date: Thu, 28 Apr 94 01:19:30 ADT
From: MJNAUGHTON@amherst.edu
Subject: polyhedra

Hi Lisa,
   Thanks for the info!  I have tried to get these books in the past and
and been told they were unavailable.  I will give those folks a call.
I should admit that while Ihave an Amherst address I'm not actually AT
Amherst (of course, there's a story behind that, which time may tell. . .)
In fact, I live up in the wilds of Millers Falls, MA, but I do make it down
to civilization every month or so for the PVPCUG meeting.
   By the way, do you know Bob Roos?  He teaches Computer Science there,
and he is quite an accomplished folder/inventor/humourist (and he turned
me on to a wonderful poster of the "59 Stellations of the Icosahedron"
which somebody there made up.
   Yes, I think I am into all of those things (though I'm not quite sure what
all of them are. . .)
Mike "I knew that degree would come in handy some day!" Naughton





Date: Thu, 28 Apr 94 04:32:12 ADT
From: "M.J.van.Gelder" <M.J.van.Gelder@rc.rug.nl>
Subject: Re: Pterodactyl

Marc,

Your Pterodactyl is in the archives with the other models.

Does your program have shading? That's an aid in discriminating the colored
and the white side of the paper.

Maarten van Gelder                   M.J.van.Gelder@RC.RUG.NL
Lichtboei 210                        Rekencentrum Rijksuniversiteit RuG
9732 JK  Groningen                   Groningen
Holland                              Holland





Date: Thu, 28 Apr 94 10:22:27 ADT
From: ab682@leo.nmc.edu (Nancy Nietupski)
Subject: Butterfly bomb

Hi,

     I must have taken down the name for Gay M. Gross's book wrong
because my librarian says that she can't find a book by her with
the title _The Art of Origami_.  I would like like to try out the
Butterfly Bomb Model so can anyone tell the real title to Ms. Gross's
book or is my librarian wrong?

With much appreciation,

Nancy

Nancy Nietupski
ab682@leo.nmc.edu





Date: Thu, 28 Apr 94 10:29:04 ADT
From: jadr@oce.nl (J. Adriaanse)
Subject: RE: The Origami Collection

Tom Hull wrote:

>So how does one get copies of The Origami Collection? I haven't a clue!
>Try contacting Mark Overmars would be one strategy. Another would be to
>write (or call) the Friends in NYC (FOCA). I would think that they'd have
>copies, and if their library system is running they might let members
>borrow the issues for a while.
>
>Hope that satisfies someone's curiosity!
>------------------------- Tom "Read it, quick!!!" Hull
>

There have been at least 15 issues of the collection. It had several editors
all over the world, including J. J. Casalonga and Robert Lang. Mark Overmars
was the editor-in-chief who made the actual journal.

I have contacted Mark but he said he is a bit out of touch with the origami
world. He handed over editorship years ago to someone named Mike Bridges. I
will ask Mark his address and write to ask what has happened to The Origami
Collection as a periodical.

As to where to get copies of old issues, I do not know.

Greetings,

Sjaak

Groeten,

Sjaak Adriaanse
jadr, 3B09, tst. 3621





Date: Thu, 28 Apr 94 13:41:02 ADT
From: Charlotte <CSTEFFAN@CMS.CC.WAYNE.EDU>
Subject: Re: Butterfly bomb

Nancy - I'm a cataloger at Wayne State University, so I looked up Gay Gross
on OCLC database. The only thing listed is "Origami: new ideas for paperfolding
" published by Mallard Press in 1990. The only book listed under the title
"The art of origami; paper folding traditional and modern" is by Samuel
Randlett, published by Dutton in 1961. That's not an exhaustive search but OCLC
IS a pretty big database. I just checked our CD-ROMs of Books In Print and
Books Out Of Print and didn't turn up anything else there. Could it be the
Mallard Press book you were thinking of? Hope this helps.





Date: Thu, 28 Apr 94 15:32:58 ADT
From: GURKEWITZ@WCSUB.CTSTATEU.EDU
Subject: info on stellations of the icosahedron

Lisa and Mike,
     How can one get a poster of the 59 Stellations of the Icosahedron?

     I got an ad for a journal  Mathematica in Education and they had
an article on the 59 Stellations of the Icosahedron that had been
done, I assume, with Mathematica.
     The e-mail address I used to get this issue free (plus subscription
info) (All I asked for was to buy a back issue) is

mathined@telospub.com

Rona





Date: Thu, 28 Apr 94 17:09:51 ADT
From: Soylent Green <rhudson@yorkcol.edu>
Subject: Art of Origami

"The Art of Origami" is the book's title.. I have it.  In fact, I ordered it
from Waldenbooks where I work.  Usually, the things we can order are pretty
readily available, and this one wasn't too hard to find.  In fact, it only took
a week or so to arrive.  It's listed under the category of "Gift Books" if that
helps, at all.  It's a bit flashy for the usual origami, with lavish color
photographs and such.  It seems like some of these type books are now
classified as "Gift" for some reason..

Rob

"Tread Softly, Grasshopper; The Buffalo is Slow, but the Earth is Patient"





Date: Thu, 28 Apr 94 19:08:15 ADT
From: Katherine C Long <kcl@world.std.com>
Subject: Re: Art of Origami

The ISBN of the Art of Origami is 0-7924-5841-9.  It is from
BDD Illustrated Books, 11540 Broadway, New York, NY 10036.  First
published in the US in 1993.  The author is Gay Merrill Gross.  I
would rate most of it as "advanced beginner", which is almost
what I'm up to!  Nice book.  Many of last year's Winter Solstice
Tree ornaments came from it.

Katherine Long
kcl@oasys.dt.navy.mil





Date: Thu, 28 Apr 94 21:25:39 ADT
From: sauron@ee.nus.sg (Soh Kam Yung)
Subject: Robert Harbin.

I've been hearing some discussions about origami books and I was
wondering if anybody uses Robert Harbin's books.

I have his books, Origami 1 to Origami 4. Does anybody know whether he
has released any more books in this series and where can I get them?

Regards

Soh Kam Yung
sauron@ee.nus.sg | engp3010@leonis.nus.sg





Date: Fri, 29 Apr 94 00:35:03 ADT
From: MJNAUGHTON@amherst.edu
Subject: 59 Stellations

Hi Rona,
    Maybe Lisa knows more -- I heard about the poster from Bob Roos, and
when I expressed interest he kindly got me one.  As I understand it, a
prof at Smith had a bunch made up -- maybe he thought he could market them,
or something, but now he's just giving them away (at least sometimes!).
I'll try to find out more from Bob. . . .
Mike N





Date: Fri, 29 Apr 94 04:53:37 ADT
From: "M.J.van.Gelder" <M.J.van.Gelder@rc.rug.nl>
Subject: On the Mathematics of Flat Origamis

Hello Tom (et al),

You wrote to me:

m>     I shall attempt to send you a PostScript version of my paper "On the
m>Mathematics of Flat Origamis". It's 9 pages, all in one file (it's mostly
m>text). I hope it's not too big.
m>     It it works, could you please put it on the archives? It'd be great
m>if we could establish a library of origami-math papers (assuming that more
m>will be written).

It is big in the sense that I could not strip off the header on my PC. I had
to do it on the ftp server itself. That was no problem.
It is in the archives now in directory origami/articles (300 K in PostScript).

Next time you want to send me something like this, please don't mail it to me
but upload it with anonymous ftp to the archives in directory
origami/.incoming (mind the dot in the path name).
I will see it when it is coming, but also send me a mail to tell me what it
is and who did it. Files that are put there without an acompanying message are
discarded...

Maarten van Gelder                   M.J.van.Gelder@RC.RUG.NL
Lichtboei 210                        Rekencentrum Rijksuniversiteit RuG
9732 JK  Groningen                   Groningen
Holland                              Holland





Date: Fri, 29 Apr 94 10:08:37 ADT
From: The Patient One <chupenr@minerva.cis.yale.edu>
Subject: Re: Robert Harbin.

On Thu, 28 Apr 1994, Soh Kam Yung wrote:

 [stuff deleted]

> Soh Kam Yung
> sauron@ee.nus.sg | engp3010@leonis.nus.sg

Hi, I don't really have an answer to your question, but I couldn't help
noticing your address....I am planning a trip to Singapore this July, and
I was wondering if you could tell me if there are any outstanding stores
that stock origami books, supplies and related things in Singapore?
Harbin's Origami 1 through 4 books are out of print... would there be by
any chance a place in Singapore that still has old copies in stock?!

What is the origami book selection like in SE Asia - would there locally
published books not available elsewhere?  Like, for instance, has anyone
created an origami durian fruit and published it?  :)

Thanks,
Penny

Penelope Chua   Biology Dept., Yale University   chupenr@minerva.cis.yale.edu





Date: Fri, 29 Apr 94 10:55:11 ADT
From: Caroline Parr <cparr@leo.vsla.edu>
Subject: gay merri'll gross's new origami book

Gay Merrill Gross's second origami book is indeed "The Art of
Origami," published by BDD Illustrated Books in 1993.  ISBN
0-7924-5841-9.  Butterfly Ball is on page 50 and is attributed
to Kenneth Kawamura of East Lansing, Michigan.

Who's going to the convention in June?

Megan Hicks -- Fredericksburg, Virginia





Date: Fri, 29 Apr 94 11:17:02 ADT
From: Soylent Green <rhudson@yorkcol.edu>
Subject: RE: Robert Harbin.

> I have his books, Origami 1 to Origami 4. Does anybody know whether he
> has released any more books in this series and where can I get them?

I have his first Origami, and New Adventures in Origami. along with xeroxes of
most of Secrets of Origami, and Origami: a stet by step guide.. I'd like to
swap for some of origami 3 and 4, which i've never seen. .which models are in
these?

"Tread Softly, Grasshopper; The Buffalo is Slow, but the Earth is Patient"





Date: Fri, 29 Apr 94 12:51:11 ADT
From: Ann Nishioka <nishioka@tigger.cs.Colorado.EDU>
Subject: bookstores

Hi Everyone!

I'll be in the Washington DC - Maryland area this summer, as
well as at the FOCA convention.  Does anyone know of outstanding
sources of books/materials in those areas?

Ann





Date: Fri, 29 Apr 94 13:53:11 ADT
From: Brian Ewins <gapv64@udcf.gla.ac.uk>
Subject: Re: On the Mathematics of Flat Origamis

Interesting paper, Tom. Makes a change from Nucl. Phys. A.
I only twigged to the 2-colourability of faces yesterday,
when I was thinking again about using a crease pattern for
representing origami on a computer. I had (and have) trouble
with 'insideness' - folding two things together - when I
noticed that adjacent polygons always face in opposite
directions...which means your 'party trick' colours opposite
sides  of the model. Nice idea!
        I think you were wrong to say this is not useful in
a computer model. We have to use checks precisely like this to
make sure the user is attempting a legal fold, and would _like_
to use the math to fold 'intelligently' - you tell the machine
the obvious parts of the fold, it completes the description of
the fold, like the way you used M-V and M to assign the last
fold at a vertex.
        Some unanswered questions I have...
1. 2-c'bility of vertices is a necessary condition for flat folds,
but not sufficient. Are there 'sufficient' statements which restrict
to a class of flods?
2. There are some things you can't get from a crease pattern, e.g.:
fold a square in half diagonally. Now fold the two acute angles along
the hypotenuse 2/3 of its length. They should overlap. There are
(counting in my head) 4 ways to arrange this from the crease pattern.
(tuck the corners in different ways)...how do I get around this?
Actually, I don't think this is so important, unless you want to
fold the model further. Consequently, the rep I used for the model
was always the crease pattern for its final state.
3. In origami, we usually don't have a free choice about where to
put points in the square; we can only bisect things and make sure
objects coincide. Is there any way to determine the points that can
be created from an 'n-th order' fold ( a fold which has been folded
over n times ) ... I don't think it matters here what kind of folds
are used.

I was going to try this out in (yet another) an origami program
where you just manipulate a crease pattern, and look at the
displayed results. The crease pattern was to include 'creases'
as well as valley/mountain folds, and edges, as types of line...
anyway, I found, like you, that I couldn't figure out whether
or not folds pierced each other...though the way I put it was much
more Anglo-Saxon than your conclusions.
(BTW: this program was going to be called 'imag' so I could type
imag *.iro ...geddit?)

        Cheers,
               Baz.





Date: Fri, 29 Apr 94 21:21:00 ADT
From: Soylent Green <rhudson@yorkcol.edu>
Subject: Re: convention

We could have an IRC conference time.. someone could start a channel #Origami!

"Tread Softly, Grasshopper; The Buffalo is Slow, but the Earth is Patient"





Date: Fri, 29 Apr 1994 18:41:42 -0300 (ADT)
From: Sheldon Ackerman <ackerman@dorsai.dorsai.org>
Subject: Re: convention

>
> On Fri, 29 Apr 1994 GURKEWITZ@WCSUB.CTSTATEU.EDU wrote:
>
> > Do we want to suggest to Foca at the convention that we are an
> > Regional Group (in cyberspace). I'm not sure what the ramifications
> > of that are except that maybe we could decide on a meeting place
> > and time.
>
> This was brought up previously by Tom Stamm. I was, and continue to be,
> opposed to this idea (and I apologize again to Tom for my tactless way of
> expressing my opinions the last time). I believe that the most important
> part of being a regional group is the idea of people actually folding
> together, something that we cannot do in this context. I prefer to see
> this group as an on-going interchange of ideas and information about
> paperfolding. And besides, what "region" do we actually cover?
>
>
>
>
The cyberspace international region! :-)

 >>><<<Sheldon Ackerman>>><<<
>>ackerman@dorsai.dorsai.org<<





Date: Fri, 29 Apr 1994 16:08:28 -0300 (ADT)
From: barber@sugar.neosoft.COM (Alex Barber)
Subject: Re: bookstores

>Hi Everyone!
>
>I'll be in the Washington DC - Maryland area this summer, as
>well as at the FOCA convention.  Does anyone know of outstanding
>sources of books/materials in those areas?
>
>Ann

For DC area -

_Second Story Books_ is in the Dupont Circle area in DC - used bookstore
with various neat books floating around, along with used tapes and CDs.
Sometimes the selection is better than at other times...

_Borders_ - the new book Mecca.  One in Bethesda, MD (I think off 355), one
on Route 7, Tyson's Corner, VA.  LARGE bookstore.  BIG.  Books for
everyone...  The one in Bethesda offloaded all the kid's books into their
own store right next to the main one.  I can go in to either of these and
wander for a while.  I am partial to the one in VA because I think it is a
little larger than the one in Bethesda - it also gets more light, IMHO.
Check it out - this is not your Uncle Olaf's Waldenbooks, Brentano's or B
Dalton...

There is a good art/architecture bookstore near 2000 Pennsylvania (on I or
K St I think) in NW DC - I will have to dig up a business card for it.
It's a small store with a lot of expensive good books.  Expensive because
some of these titles come straight from Europe + Japan...  Ahh, I remember
the name now - _Franz Bader_...

Also in the Dupont Circle area is _Ginza_, on Connecticut Ave - various
Japanese things, including origami paper and books.

There are other new and used bookstores in the Dupont Circle area,
inlcuding such things as _Lambda Rising_, which targets the gay population
in that area.

There was also an international bookstore around there as well on
Connecticut Ave...

Georgetown also has an international bookstore off Wisconsin and Q or P -
French, Spanish, etc - no origami stuff in either of these int'l stores.

I think that's enough to get you started. :)

If you go to the Dupont Circle area, check out _Cafe Petito_, on Conn. Ave
- Ital restaurant that serves _fried pizza_ - odd idea but it's very good
and very rich.  SInce it's fried, it's very bad for you and is greasy :)
but very yummy.  I will have to got there when I'm in DC in May.  When you
order a topping they have this tendancy to cover the pizza in it - order
pepperoni and you get a pizza covered w/ deli slices on pepperoni.  Same
goes for veggies and spices.

New York -

All I remember is Books Nippon, now defunct I believe, and Kunakuniya (sp?)
- the latter was a block away from Rockefeller Center - I will have to do
some searching when I'm in the area for the convention to find where the
Japansese stores have gone to...

Let me know if this helps
Alex

barber@sugar.neosoft.com

I will not be pushed, filed, stamped, indexed, briefed, debriefed or
numbered.  My life is my own.





Date: Fri, 29 Apr 1994 13:08:32 -0300 (ADT)
From: Sheldon Ackerman <ackerman@dorsai.dorsai.org>
Subject: Re: convention

>
> Who's going to the convention in June?
>
> Megan Hicks -- Fredericksburg, Virginia
>
I should be there on Sunday.

 >>><<<Sheldon Ackerman>>><<<
>>ackerman@dorsai.dorsai.org<<





Date: Fri, 29 Apr 1994 16:49:11 -0300 (ADT)
From: "T.K. Lam" <mud05@cc.keele.AC.UK>
Subject: Re: Robert Harbin.

>
> > I have his books, Origami 1 to Origami 4. Does anybody know whether he
> > has released any more books in this series and where can I get them?
>
> I have his first Origami, and New Adventures in Origami. along with xeroxes of
> most of Secrets of Origami, and Origami: a stet by step guide.. I'd like to
> swap for some of origami 3 and 4, which i've never seen. .which models are in
> these?

    Origami 2 is known as New Adventures... in the US.

  Origami 3 includes some excellent 'early technology' folding by Neal
Elias( many clever uses of the bird base, Patricia Crawford( Turtle ) and
Fred Rhom. (sp?)

    Origami 4 was the last in the series, containing more of the same, with
a healthy British contribution from Dave Brill( 'Flip top' cigarette packet,
Martin Wall( Hand with Olympic Torch), Max Hulme (Lizard, Tipper Truck).

    Robert Harbin is now sadly deceased, and the only Harbin book in print
is Origami 1, known as Teach_Yourself_Origami.  One book I haven't seen
mentioned here is Paper_Magic, published in the 1950s, with illustrations by
one Rolf Harris( The diagrams precede the Yoshizawa-Randlett
standardisation).  This book apparently had a great effect on many of the
first generation of British folders.

   Origami:_Step_by_Step is well worth getting hold of to appreciate the
approach used by 'technologists' in the 1970s.  It would be informative to
compare with, say Origami_for_the_Coinoisseur: there seems to be much more
reliance on traditional bases, and less efficient use of paper, resulting in
very thick layers, and therefore requiring foil. ( John Smith's theory of
Shape and Surplus).

   PS.  I have some spare copies of Origami 1,2 and 3, and Paper_Magic, if
anyone is interested.  Unfortunately Origami_4 and Step_by_Step seem to be
quite rare. ( Try searching the public library for these and other older
books )

Tung Ken Lam
mud05@potter.cc.keele.ac.uk





Date: Fri, 29 Apr 1994 13:26:24 -0300 (ADT)
From: GURKEWITZ@WCSUB.CTSTATEU.EDU
Subject: Re: convention

Do we want to suggest to Foca at the convention that we are an
Regional Group (in cyberspace). I'm not sure what the ramifications
of that are except that maybe we could decide on a meeting place
and time.

Rona





Date: Fri, 29 Apr 1994 14:49:16 -0300 (ADT)
From: Joseph Wu <jwu@cs.ubc.ca>
Subject: Re: convention

On Fri, 29 Apr 1994 GURKEWITZ@WCSUB.CTSTATEU.EDU wrote:

> Do we want to suggest to Foca at the convention that we are an
> Regional Group (in cyberspace). I'm not sure what the ramifications
> of that are except that maybe we could decide on a meeting place
> and time.

This was brought up previously by Tom Stamm. I was, and continue to be,
opposed to this idea (and I apologize again to Tom for my tactless way of
expressing my opinions the last time). I believe that the most important
part of being a regional group is the idea of people actually folding
together, something that we cannot do in this context. I prefer to see
this group as an on-going interchange of ideas and information about
paperfolding. And besides, what "region" do we actually cover?





Date: Fri, 29 Apr 1994 20:42:50 -0300 (ADT)
From: CHAPBELL@delphi.COM
Subject: Polly want a Hedron? (ftp)

All you polyhedral people,
    May I suggest Kaleido, a program which draws stick figures of all manner
of polyhedra on the screen and then rotates them?  (Hit tab, and it shows up
the dual.)  I like it a lot, and it's useful when trying to visualize the
difference between cubihemioctahedra and rhombicuboctahedra and so on...
    I got it in msdos, but it looks to have been ported to various platforms.
It can be had at various places (try archie), but I found it at:
    wuarchive.wustl.edu
    /graphics/graphics/mirrors/gauss.technicon.ac.il/kaleido/[versions]

    And I think it exports to Postscript.
    <>Philip Craig Chapman-Bell<>





Date: Fri, 29 Apr 1994 15:33:26 -0300 (ADT)
From: stamm@aol.COM
Subject: Re: convention

> Do we want to suggest to Foca at the convention that we are an
> Regional Group (in cyberspace). I'm not sure what the ramifications
> of that are except that maybe we could decide on a meeting place
> and time.
>
> Rona

We could at least participate in the Regional Group Directory (zine) as the
Cyberspace Region ;)

Tom





Date: Sat, 30 Apr 94 10:46:23 ADT
From: GURKEWITZ@WCSUB.CTSTATEU.EDU
Subject: Re: convention

> Do we want to suggest to Foca at the convention that we are an
> Regional Group (in cyberspace). I'm not sure what the ramifications
> of that are except that maybe we could decide on a meeting place
> and time.
>
> Rona

>We could at least participate in the Regional Group Directory (zine) as the
>Cyberspace Region ;)

>Tom

I think more awareness of our list can add members.
Maybe Tom would like to speak about the list at  the Regional Group
meeting.
And maybe the regional groups with newsletters would like to publish
on-line. Is there a name for shareware online publications?

Rona





Date: Sat, 30 Apr 94 12:31:45 ADT
From: stamm@aol.com
Subject: Re: convention

> I think more awareness of our list can add members.
> Maybe Tom would like to speak about the list at  the Regional Group
> meeting.

Michael Shall has asked me to do a "class" at the convention on the contents
of the OLO Digest.  I am planning to do this.

> And maybe the regional groups with newsletters would like to publish
> on-line.

As far as I know "Online Origami" is the only online origami publication
currently being published.

> Is there a name for shareware online publications?
>
> Rona

I believe the current term of a "shareware online publication" is E-zine
(like E-mail)  for Electronic Zine.  Zine (pronounced ZEEN) is a term for a
"non-mainstream magaZINE."  It is a sorten form of "FanZine" originally
applied to Science Fiction "FanZines."

PS - There is a catalog of underground zines call "Some Zines" by Tom Trusky;

Published by Cold Drill Books.  ISBN 0-916272-56-7





Date: Sat, 30 Apr 1994 11:48:28 -0300 (ADT)
From: GURKEWITZ@WCSUB.CTSTATEU.EDU
Subject: origami book for the blind

Just got a BOS newsletter and they review a book on origami for
blind people. I don't know if the diagrams are raised or if
the directions are in braille.

Has anyone seen this book?

Rona





Date: Sat, 30 Apr 1994 03:17:28 -0300 (ADT)
From: stamm@aol.COM
Subject: OLO Digest: Request for assistance.

Dear All:

I am currently compiling an origami computer resource "paper" for the
convention.  I
am attempting to write this for computer novices, but I also want to supply a

"directory" of computer resources for origami.  I have the first rough cut
assembled, mostly from past issues of FOLD, Imagiro and Online Origami.  I
would
like to solicite help in proof reading and general technical corrections.

I plan to make this document available to anyone, in any form, with no
copyright
protection.  This is strictly for fun and glory and no $$$.

Attached is the current outline.  If you are interested in helping or wish to
add any
sections of your particular interests (There are a few holes -- I don't KNOW
EVERYTHING),  please contact me at stamm@aol.com and we can make arrangement
to get you a copy.

If you simply want a copy, please wait till after we are done.  I'll post a
message
before contacting me.

Thank you in advance,
Tom Stamm

OnLine Origami Digest 1994

1. Introduction
2. Communications
2.1. About Communications
2.1.1. Modems
2.1.2. Networks
2.2. Internet
2.2.1. About Internet
2.2.2. E-MAIL -- Electronic Mail
2.2.3. FTP -- File Transfer Protocol
2.2.4. RLOGIN or TELNET
2.3. Outernets
2.3.1. America Online (AOL)
2.3.2. CompuServe
2.3.3. Genie
2.3.4. Prodigy
2.4. Origami BBS
2.5. The Origami Model Index
3. File Formats
3.1. About Files
3.1.1. Text Files
3.1.2. Binary Files
3.1.3. The dilemma of files.
3.1.3.1. Disks
3.1.3.2. Online transmission
3.1.4. About Macintosh Files (Binary vs. MacBinary)
3.2. GIF
3.3. Digital Paper -- Common Ground by No Hands Software
3.4. Acrobat -- by Adobe
3.4.1. Acrobat Exchange
3.4.2. Acrobat Distiller
3.4.3. Acrobat Reader
3.5. Postscript
3.6. Replica -- Farallon
4. Online Origami - The Zine
4.1. Case Study
5. Glossary
6. Comments





Date: Sun, 01 May 1994 19:26:52 -0300 (ADT)
From: Brian Ewins <gapv64@udcf.gla.AC.UK>
Subject: Re: On the Mathematics of Flat Origamis

The paper asks if there is a global condition for flatness...
I would suggest a solution based on what we really do: find the
class of folds which preserve flatness; if the crease pattern
can be created by a series of folds from within this class,
then it is (obviously) foldable.
        I realise this suggestion isn't entirely helpful:
and finding the class of folds required is not going to be
easy.
        Reflecting on this I was fascinated by the patterns
that the creases make; I was interested to see if you could
identify the fold sequence afterwards, and made these observations
(no doubt noted elsewhere...)
Simple folds produce chains of valley/mountain folds which change
parity every time they cross a previous fold. At these folds,
the angle the new fold makes as it meets the old fold is the
same on both sides of it (this follows from Kawasaki's theorem)
...things are a little more complicated when the folds go through
existing vertices. The chains are either closed or terminate
at the edges of the paper.

Reverse folds produce similar chains, which are the same type of
fold (valley or mountain) all the way along their length, instead
of alternating. Consequently, repainting of fold lines is
necessary on one side of the fold (all on one side of the chain).

Squash folds are different beasts: it requires undoing one fold
and making three new ones; so the first vertex is more complicated
already than the other two types. The chains formed are more
complex too; if we see the squash fold as being one valley fold
and two mountin folds, the chain formed by the valley fold
stops in the middle of the paper (though is there is paper inside
the squashed pocket it might form 'normal' chains). It's probably
best to see the mountin folds as being the 'heads' of two similar
chains- both of which stop in the middle of the paper, at the vertex
where the squash is made. Then these chains always alternate.

Because of all of this, I guess it would be best to start on
mountain/valley folds which don't go through existing vertices:
this guarantees that _every_ vertex has four edges at it; and
chains are fairly easy to identify. The next step is to figure
out which came first - which is pretty obvious - before looking
at whether each fold preserves flatness.
The repainting in reverse folds makes it difficult to say how
a particular crease pattern was folded, since the 'colours'
of the edges can change: this is compounded in squash folds,
since folds necessary to get to the squash stage are removed from
the pattern entirely. This means that in the problem you
have set yourself (how to colour a given crease pattern) you would
assume that only simple & reverse folds are used.
        One problem with all this...if pockets of paper contain several
layers, several chains must be drawn on the paper simultaneously.
(all layers folded together). How can you tell if two chains are
related in this way ?
This has probably been old hat to Tom & Joseph, I'd guess; it's
all new on me. Tom - does current research go much further
than the stuff in your paper ? Also, what journals should I be looking
in if I wanted to see origami maths ? I don't even know which
section it would come under in the Mathematical Review.

        Cheers,
               Baz.





Date: Sun, 1 May 94 23:33:20 ADT
From: vedder@polyhedra.tiac.net (Vedder Wright)
Subject: Re: Polly want a Hedron?

>All you polyhedral people,
>    May I suggest Kaleido, a program which draws stick figures of all manner
>of polyhedra on the screen and then rotates them?  (Hit tab, and it shows up
>the dual.)  I like it a lot, and it's useful when trying to visualize the
>difference between cubihemioctahedra and rhombicuboctahedra and so on...
>    I got it in msdos, but it looks to have been ported to various platforms.
>It can be had at various places (try archie), but I found it at:
>    wuarchive.wustl.edu
>    /graphics/graphics/mirrors/gauss.technicon.ac.il/kaleido/[versions]

If anyone hears about this program in a Mac version, would they please let
me know? I would be very interested.

For those interested, there is an ftp archive with some geometry things at
forum.swarthmore.edu, in the path /software/mac/.

There are a few DOS things in /software/pc/  but there are more things in
the Mac side. For the Mac, I especially recommend reptiles (an elaborate
tiling program), and hypercube 1.0, which will rotate a hypercube with
simple controls.

A hypercube is a 4th dimensional object, which can cast a 3D shadow as it
rotates, exactly as a 3D object in our world can cast a 2D shadow.

Try it, you'll like it.

*******

If you are interested in a geometry newsgroup, contact
annie@forum.swarthmore.edu. She will give you the details. Annie is in the
center of a swarming nest of networking geometers.

You have to ask your system administrator to add these geometry newsgroups
to your newsgroups list, as they are not distributed through the usual
channels. At least that is the way things used to be.

********

I don't want to start a thread about geometry here, as this newsgroup is
not about that, but thought this might be of interest in view of some past
postings.

Vedder

Vedder Wright
Internet Evangelist





Date: Mon, 02 May 1994 02:44:42 -0300 (ADT)
From: GURKEWITZ@WCSUB.CTSTATEU.EDU
Subject: Re: On the Mathematics of Flat Origamis

Does this problem remind any of you computer types of Waltz's
labellings of realizable 3D diagrams.(Winston's latest AI book)

A long time ago someone completed and extended Waltz's system
and the paper was out of Carnegie Mellon with the name origami
in it.

Rona





Date: Mon, 02 May 1994 00:07:12 -0300 (ADT)
From: MJNAUGHTON@amherst.edu
Subject: cyberregional group

Rona suggested we identify ourselves as a "regional group".  I don't know
what all the ramifications are, but I' sure of at least two things:
a) we'll be invited to send a representative to a "regional group break-
fast" organized by Paul Kruger
b) we'll be "invited" to contribute to his "regional group" newsletter/
idea-swap.
(Note: I'm not saying this is BAD, I'm just saying this will happen!)  Caveat
Folder!
  By the way, I LIKE the idea of identifying ourselves with "OLO" on our name
badges (since I, for one, am TERRIBLE with names!)
Mike "I like to fold, but I have limited enthusiasm for TALKING about folding"
Naughton
