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arkeet
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Retired student.

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61
How can I find the points at which two circles intersect?
Dec 11, 2012
23
Why are the last two numbers of this sequence never prime?
Sep 24, 2016
15
How to prove that $\mathrm{SL}_{2} (\mathbb F_{3})$ is not isomorphic to $S_{4}$?
Oct 4, 2016
14
Compute $\int^{\pi/2}_0 \frac{dx}{(a^2\cos^2 x + b^2 \sin ^2 x)^2}$
Sep 24, 2016
12
For $k$ a field, $k[x]$ is Noetherian but not Artinian?
Oct 9, 2016
11
When do coproducts map canonically to products?
Sep 30, 2016
10
Homotopy equivalence of pairs
May 22, 2018
9
Why does the number of regions in a circle cut by chords joining $n+1$ points equal the number of regions in $\mathbb{R}^4$ cut by $n$ hyperplanes?
Dec 4, 2019
9
Prove that $AB = 0$ implies $\det\left(A + B\right)^2 = \det\left(A - B\right)^2$.
Oct 21, 2016
8
If $s$ is transcendental, is $\frac{1}{s}$ transcendental?
Dec 5, 2019
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A "dimension" for Tychonoff spaces