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 Aug21 answered What was the first bit of mathematics that made you realize that math is beautiful? (For children's book) Jun20 asked Existence of sets with four common elements among 16000 sets. May25 answered Meaning of dot symbol “·” in this context? May16 answered What is the most fundamental trigonometric function: cosine or sine? May11 answered Prove that the following limit exists and find it! May11 answered Inscribed Angles in Two Cyclic Quadrilaterals May10 answered Generalization of Binomial Coefficients Congruence May7 answered Inverse Identity + Constant Matrix May7 answered Find the determinant of the following; May4 answered Partial sums for a power series May4 answered Prove That $f(n+f(n))=n$ May4 answered How to prove this identity?(perhaps related to partition) May3 answered How do I find the equation of a line that passes through point and two skew lines May3 answered Prove that a graph with $n$ vertices and less than $n$-1 edges, is disconnected. May3 answered What's the behavior of $\displaystyle\sum_{n=1}^\infty (z+\sqrt{5}+2i)^{n!}$ outside its radius of convergence? May3 answered If $f$ differs from a uniformly continuous function by less than $\epsilon$ for any $\epsilon$, then $f$ is uniformly continuous Apr22 answered Squares modulo 2^n Apr21 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? Apr19 answered Why do we call primes, and not the number one, *the atoms of numbers*? Apr17 asked Infinitesimal multiplication