maths.orger.org
by Owen Orger
Level 9 – Undergraduate maths Part 3 (Based on my third and fourth terms at Cambridge)
9.1 - Optimization
9.2 - Variational principles
9.3 - Analysis
9.4 - Linear algebra
9.5 - Markov chains
Don't worry I'm not skipping the methods course - see level 11, an entire level dedicated to the course