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smoothed triangle function with controllable segment lengths

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Prove that the fraction ${n!+1over1+n^2}$ is irreducible for every integer $n>1$.

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Continuous function from the closed unit disk to itself being identity on the boundary must be surjective?...

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Can there be a subgroup $K$ of a group $G$ such that for some $a in G$, $aK subseteq Ka$ but $Ka nsubseteq aK$?...

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Is it correct/acceptable that my recurrence relation depends on both the upper and lower indices in the series?...

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Analytical Proof for the Inequality of Minimum Values of a Transcendental Function with Varying Number of Variables...

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Summation notation question (simplification of multiple summations)

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Let $S_1$ and $S_2$ be compact surfaces where $S_1$ and $S_2$ are homeomorphic. Then $S_1$ is orientable iff $S_2$ is orientable...

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SAS triangle angles

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Convert an equation to its elliptic form

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