• Surfaces
  • Regular old boring plane
    the simplest surface
  • Elliptic cylinder
    an example of a generalized cylinder
  • Surface of revolution
    these surfaces are made up of circles
  • traces of the graph of z=x²+y²
    courtesy of Professor Jonathan Rogness of the University of Minnesota
  • Torus knots
    Knots such as the trefoil knot can be "fattened up" to make
    interesting surfaces. There is a torus knot web site at
    Wolfram Research, Inc where you can manipulate these knots.