Linear Algebra
- 15min - Big picture of the four subspaces and their dimensions. C(A), C(AT), N(A), N(AT)
Number Theory
- Why is sqrt(2) special? - originally discovered by the babylonians, this irrational number (cannot be expressed as a fraction) shows up in simple thing like an A4 paper. Also see the simple proof by contradiction in this short video.
- Eulers number and the origins of the constant - e. The natural rate of growth.
