24 Answers votes newest views recent 3What are the most important open problems in algebraic combinatorics? 6Partial order relation on subsets 2Trichotomies in mathematics 2Graph of $S_n$ with respect to transposition 0What would you want to see at the Museum of Mathematics? 4Examples where adding complexity made a problem simpler 3Cohomology Ring of the Flag Manifolds, Cartan Subalgebras, and Weyl Groups 4Intersection theory for $G$-varieties - an action on the chow ring? 7References request on the algebraic geometry of projective homogeneous spaces 4Continuous notions with compelling discrete analogues 11Interesting mathematical documentaries 4Where to publish a math textbook in Creative Commons 5The pseudoeffective cone does not contain lines 1Good combinatorics textbooks for teaching undergraduates? 0Theory of cones 2Chains in $K\backslash G/B$ lying over a closed $K$-orbit 2Covering relations in $K\backslash G/B$ 2Where does a math person go to learn quantum mechanics? 5Learning Tropical geometry 5Motivating Algebra and Analysis for Average Undergraduates 3Dimension of spaces of invariants/tableaux functions 0What is the “right” deifinition of the homology(cohomology) of an orbifold? 4Configuration space of flags 4the blowing up of a plane curve playing me tricks.