13 Answers votes newest views recent 52Video lectures of mathematics courses available online for free (12) 77Most memorable titles 22Demonstrating that rigour is important 11What are the big problems in probability theory? 2V. A. Gorbatov and 4-color problem 3What are your experiences of handouts in mathematics lectures? 4Making sure that you have comprehended a concept 2Theorems with unexpected conclusions 21Pedagogical question about linear algebra 4probability puzzle - selecting a person 5How important are publications for undergrads? 2Smoothing out Noisy Data 4A random walk matrix has eigenvalue 1 with multiplicty 1 - why?