interesting and have tried to learn.

Sometimes I've written the notes for

a class I've taught, and sometimes

I've written them just for myself.

- Dehn Dissection Theorem
- Dehn-Sydler Theorem and companion applet
- Banach Tarski Theorem
- transcendence of Pi & Lindemann's Theorem
- Machin's Formula for Pi
- Weierstrass uniformization
- error correcting codes
- Modular Forms and Fourier Series
- Multiplication and the Fast Fourier Transform
- Random Graphs
- Kastelyn's formula for perfect matchings
- Link Universality
- NP Completeness
- Basic Symplectic Geometry
- Hadamard's Theorem
- Mostow Rigidity
- Thurston's Shapes of Polyhedra
- ZF, Choice, Zorn, Ordinals, Ultrafilters
- The Positive Dominance Algorithm
- The Cut Locus and The Jordan Curve Theorem
- Random Walks and Electric Networks
- Jordan Curve Theorem
- Components of the Fiber Product