23 Answers votes newest views recent 17Fixed point theorems 11Testing simplicial complexes for shellability 7Combinatorial distance between simplicial complexes 6Are there “geometrically nice” sets from which to construct coverings that admit “Vietoris-Rips like” approximations to the nerve? 5When polynomial f(x^2) can be factored as g(x)·g(-x) ? 8Algebraic Morse theory 4The terminology for a node’s number of in-links in weighted directed graph 5Financial Mathematics Books 7radius of tubular neighborhood 6Discrete Morse function from smooth one 7Is there a discrete Cerf theory? 9Tetris-like falling sticky disks 5Terminology Concerning Oriented Simplicial Complexes 10Raoul Bott’s quote on Morse Theory cited by Bestvina and Kahle: where is it from? 6Not especially famous, long-open problems which anyone can understand 5Inflate a simplex, change rows to make the rank n 8Is this graph known? 5Probability of zero in a random matrix 6How to get the largest subset of a set of sets of intervals with no overlapping intervals 13When (if ever) disclose your identity as a reviewer? 5Combinatorial Morse functions and random permutations 11Homological computations 14Taking “Zooming in on a point of a graph” seriously.