Topologi på roterommet
306030
BID, February 2013 (At h-bar)
1. Is size always important?
2. To comb the hair of a sphere
3. The Euler charcteristic
4. Fusion reactors
5. A flat world?
6. Pacman's universe
7. What is the shape of space?
8. A flat but finite universe
A. State spaces
B. The study of spaces
C. What is a deformation?
D. How to calculate with spaces

http://www.math.hmc.edu/funfacts/ffiles/20007.7.shtml#

Deformations

The links to the right are in playdough.

Can you "deform" one into the other? (tearing or cutting or the like obviously NOT allowed)


Mug_and_Torus_morph.gif Examples like this drive home the fact that we need presise definitions. E.g.



Bjørn Ian Dundas