41:58

The Poincare-Lindsted Method

12:15

The Duffing Oscillator

28:33

Regular perturbation theory

28:36

Predator-prey models

31:12

Forced Duffing Harmonic Balance

30:34

Sturm-Liouville Theory

30:11

Eigenvectors and Eigenvalues

27:17

Green's functions, Delta functions and distribution theory