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 Jul 25 answered How to come up with this recurrence relation for putting p rooks in a m×n chessboard? Aug 21 answered What was the first bit of mathematics that made you realize that math is beautiful? (For children's book) Jun 20 asked Existence of sets with four common elements among 16000 sets. May 25 answered Meaning of dot symbol “·” in this context? May 16 answered What is the most fundamental trigonometric function: cosine or sine? May 11 answered Prove that the following limit exists and find it! May 11 answered Inscribed Angles in Two Cyclic Quadrilaterals May 10 answered Generalization of Binomial Coefficients Congruence May 7 answered Inverse Identity + Constant Matrix May 7 answered Find the determinant of the following; May 4 answered Partial sums for a power series May 4 answered Prove That $f(n+f(n))=n$ May 4 answered How to prove this identity?(perhaps related to partition) May 3 answered How do I find the equation of a line that passes through point and two skew lines May 3 answered Prove that a graph with $n$ vertices and less than $n$-1 edges, is disconnected. May 3 answered What's the behavior of $\displaystyle\sum_{n=1}^\infty (z+\sqrt{5}+2i)^{n!}$ outside its radius of convergence? May 3 answered If $f$ differs from a uniformly continuous function by less than $\epsilon$ for any $\epsilon$, then $f$ is uniformly continuous Apr 22 answered Squares modulo 2^n Apr 21 answered Suppose $\{f_n\}$ is a sequence of functions with $f_n$ bounded. If $\{f_n\}$ converge point-wise to $f$ then $f$ is bounded? Apr 19 answered Why do we call primes, and not the number one, *the atoms of numbers*?