Of triangles, gases, prices and men. A superb talk by Cedric Villani that describes the connections between seemingly very different fields of mathematics.
The history of mathematics. A fascinating lecture course by Norman Wildberger that starts with Greek mathematics and ends with the development of non-Euclidean geometry.
Functional Analysis lecture notes by Michael Struwe. The best introduction to Functional Analysis I've had the pleasure to read. In German unfortunately....
The Feynman Lectures. Self-explanatory. Definitive introduction to college-level physics.
How to write Mathematics, a short guide by Paul Halmos. Extremely valuable for researchers who are just starting to write mathematical articles.
Muhammad Hassan
Post-doctoral Researcher
Chair of High Performance Numerical Algorithms & Simulations
École Polytechnique Fédérale de Lausanne (EPFL)