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 2d awarded Revival Apr 20 awarded Notable Question Mar 7 answered Homotopy extension property vs. good pairs Nov 29 comment Find $\int _{[0,1]} f \, \, d \lambda$ What does the \lambda mean here? Oct 7 comment Total complex homology exact sequence I think you mean $d_{p,q}^v(b)=0$ on the third line numerator. Feb 9 awarded Popular Question Dec 20 awarded Constituent Dec 9 awarded Caucus Nov 18 awarded Yearling Sep 24 awarded Autobiographer Aug 13 accepted Simplifying a generating function in two variables with two binomial coefficients Aug 13 comment Simplifying a generating function in two variables with two binomial coefficients @Did not really, I mean that's the position that I started from, since the Chern class of a direct sum is the product of the Chern classes of the summands. I abandoned this question since I didn't get any other answers, but I guess yours is as close as I can get. Jul 29 asked Simplifying a generating function in two variables with two binomial coefficients Jul 21 comment Relative cohomology of a vector space module non-zero vectors Of course. Thanks! If you want to make that an answer I'll be sure to accept it. Jul 21 comment Relative cohomology of a vector space module non-zero vectors Yes, that is actually quite useful. So everything can be computed just using the sequence $H^0(\mathbb R^n,\mathbb R^n_0;\mathbb Z)\to H^0(\mathbb R^n;\mathbb Z)\to H^0(\mathbb R^n_0;\mathbb Z)\to H^1(\mathbb R^n,\mathbb R^n_0;\mathbb Z)\to \cdots$? Jul 21 asked Relative cohomology of a vector space module non-zero vectors Jul 2 awarded Curious May 10 asked What are all the possible sums (and how often do they occur) of a k-subsequence of an n-sequence of integers? Aug 31 comment Regional Mathematics Olympiad(RMO-India) Geometry Problem Watch your assertions there, guy. I have zilch idea of what level your competition is at; there are competitions where this type of language is used to mask a simple problem, i.e. one where any specific situation simplifies to the general case. Aug 31 comment Regional Mathematics Olympiad(RMO-India) Geometry Problem My bad, I'm not familiar with the RMO-India question setup. Questions posed in this way in competitions I've gone to can be solved in this way.