Trefoil knot on a pair of joined Seifert surfaces
$140.64
Noncontinuous Function of two variables
$328.00
Doubly Ruled Hyperboloid
$18.55
Hyperboloid showing hyperbolic and elliptic cross
$17.40
Doubly Ruled Hyperbolic Paraboloid
$8.13
Hyperbolic Paraboloid showing parabolic cross sect
$8.12
$6.68
Hyperbolic Paraboloid showing hyperbolic cross sec
$6.70
Ruled Helicoid
$10.62
Dini's Surface
$27.90
Pluecker's conoid
$21.74
Pluecker's conoid k=3
$22.22
Pluecker's conoid k=4
$25.09
Genus 2 surface mesh
$136.21