30 Answers votes newest views recent 35Colloquial catchy statements encoding serious mathematics (2) 17How many mathematicians are there? 16Work of ICM 2010 plenary speakers (and other humans) 15Real-world applications of mathematics, by arxiv subject area? 13Who coined the name tensor and why? 11Biographic Data/Stories about André Néron 6What is so “spectral” about spectral sequences? 6Canonical examples of algebraic structures 6Mathematicians who were late learners?-list 6How do I make the conceptual transition from multivariable calculus to differential forms? 5Major mathematical advances past age fifty 5Is symplectic reduction interesting from a physical point of view? 4candidate for rigorous _mathematical_ definition of “canonical”? 4What are examples of mathematical concepts named after the wrong people? (Stigler’s law) 4How to figure out the type of the bifurcation in a dynamical system? 4Where does a math person go to learn quantum mechanics? 4Is a smooth closed surface in Euclidean 3-space rigid? 4Hamiltonian S^1 actions with isolated fixed points 3Zeta function for curves in a manifold 3Equations for Integrable Systems 3Birkhoff conjecture about integrable billiards 2Adaptive controllers for stiff ODE and DAE integrators 2Magic trick based on deep mathematics 2Where can I learn about (the asymptotics of) Toeplitz operators? 2Intuition for the last step in Serre’s proof of the three-squares theorem 1How is tropicalization like taking the classical limit? 1Helm’s improvement to Beck-Fiala theorem 1What kind of uniqueness can I conclude for solutions to a simple functional equation? 1Learning through guided discovery 0How important are publications for undergrads?