# record 1: header: parent, keywords
# record 2: calling parameters
# record 3: submit buttons
# record 4: html form content

:geometry, analytic geometry, algebraic geometry
implicit, parametric, implicit surface, parametric surface, space surface,
surface, parametric space surface, equation, implicit equation,
parametric equation

:precision, 12
operation, parametric to implicit surface
size, 600x360

:, Find the implicit equation

:
 $submit1
 of a parametric surface:
 <br>x = f(u,v) =
 <input type="text" size="15" name="formula" value="u^2+v">
 <br>y = g(u,v) =
 <input type="text" size="10" name="formula" value="uv+1">
 <br>z = h(u,v) =
 <input type="text" size="10" name="formula" value="v^2-1">
