PICKG(1)

NAME
pickg - countg : Count graphs according to their properties.

SYNOPSIS
[pickg|countg] [-fp#:#q -V] [--keys] [-constraints -v] [ifile [ofile]]

DESCRIPTION

    countg : Count graphs according to their properties.

    pickg : Select graphs according to their properties.

    ifile, ofile : Input and output files.

    '-' and missing names imply stdin and stdout.

    Miscellaneous switches:

-p# -p#:#
    Specify range of input lines (first is 1)

-f  With -p, assume input lines of fixed length (only used with a file in graph6 format)

-v  Negate all constraints

-V  List properties of every input matching constraints.

-q  Suppress informative output.

    Constraints:

    Numerical constraints (shown here with following #) can take a single integer value, or a range like #:#, #:, or :#. Each can also be preceded by '~', which negates it. (For example, -~D2:4 will match any maximum degree which is _not_ 2, 3, or 4.) Constraints are applied to all input graphs, and only those which match all constraints are counted or selected.

-n# number of vertices -e# number of edges

-d# minimum degree -D# maximum degree

-r  regular -b bipartite

-z# radius -Z# diameter

-g# girth (0=acyclic) -Y# total number of cycles

-T# number of triangles

-E  Eulerian (all degrees are even, connectivity not required)

-a# group size -o# orbits -F# fixed points -t vertex-transitive

-c# connectivity (only implemented for 0,1,2).

-i# min common nbrs of adjacent vertices; -I# maximum

-j# min common nbrs of non-adjacent vertices; -J# maximum

    Sort keys:

Counts are made for all graphs passing the constraints.
    Counts

    are given separately for each combination of values occurring for the properties listed as sort keys. A sort key is introduced by '--' and uses one of the letters known as constraints. These can be combined: --n --e --r is the same as --ne --r and --ner. The order of sort keys is significant.