Mathematics
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Paolo

I studied Maths a long time ago and I'm trying to understand and learn something more.

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  • Last seen Sep 12 at 19:09

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Top posts (22) All Questions Answers | Votes Newest

8 If $a_1,\ldots ,a_n >0$ and $S=a_1+\ldots + a_n <1$, then $(1+a_1)(1+a_2)\ldots (1+a_n)(1-S) < 1$ Jul 27
6 Homotopy type of the complement of a subspace Aug 28 '18
4 Proving $\left\{ \frac{1}{n} \right\}$ is Cauchy Jul 25 '15
3 What is the angle between these unit vectors? Jun 22 '15
3 Conrad's “Dihedral groups”: Rigid motions taking a regular $n$-gon back to itself carry vertices to vertices Apr 22
3 Does $a^2(x) = b^2(x) (1 - x^2)$ imply $a = b = 0$? Jun 21 '15
2 A finite set and the set of its fixed points under any involution have cardinalities of the same parity Jul 25 '15
2 Limit of derivative does not exist, while limit of difference quotient is infinite Feb 8 '16
2 Necessary and sufficient condition for the union of two intervals to be an interval Jul 29 '16
2 Arithmetic mean, geometric mean and definite integral Jun 9
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