1. Klein Bottle

(A basic non-orientable, two-dimensional, compact manifold without boundary)

1(b).Klein Bottle (2) Interactive

2(a).Projective Plane

Another basic non-orientable, two-dimensional, compact manifold without boundary)

2(b).Projective Plane (2) Interactive

3.Menger sponge Interactive

An interesting topological space (and a nice 3D fractal)

4."Space Station"

Just a nice 3D fractal

5. 2D fractal (interactive !)

Sierpinski triangle (space) (2D, set in 3D)

6. 4D Cubes (interactive !)

A construction made of 4D cubes (part of a proof)

7. Tangled Cube (interactive !)

An implicitly defined surface.

8. Revolving surfaces/solids can be found in the page for course 136.170

9. Travel in Klein

Experimenting with 3D shadows of 4D objects