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 Aug 24 asked Prove that the only numbers not expressible as a sum of consecutive positive integers takes the form $2^n$ for some $n \in \mathbb N$ Feb 10 asked Buy more lottery tickets or more multipliers? Dec 8 asked Proving that $\sum_j x^j$ is differentiable $(-1,1)$ Dec 8 asked Showing that $\sum_j e^{-jx}x^j$ converges uniformly Nov 16 asked How to show that $\sum {2^j + j \over 3^j - j}$ converges Nov 7 asked How to prove Riemann integrable with partitions Nov 7 asked Squares of differentiable functions Nov 5 asked Limit of metric of sequences Oct 31 asked Finding a nonzero continuous function that satisfies this integral equation, but not unique? Sep 8 asked Showing that $(a_n^2)$ is Cauchy implies that $(a_n)$ is Cauchy Jun 14 asked Checking an inductive proof on a combinatorial product Jun 13 answered Introductory books on complex analysis? Jun 12 asked Binomial coefficients equal to a prime squared Jun 4 answered Suggest an Antique Math Book worth reading? Jun 4 asked Trying to prove an identity about a product May 30 asked Number of possible pairs from $\{1,\dots, n\}$ with $i < j$ May 23 asked How to find instances when $d(a,b) = p^2$ for $p$ a prime. May 14 asked How to write down the maximal subgroups of $GL(9, \mathbb{C})$ Apr 27 asked How to compute the weights of $\Gamma_{3,1}$ the irrep of $\mathfrak{sl}_3\Bbb C$ Apr 27 asked Weights versus roots