Mathematics
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Chessanator
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16
What is the difference betwen equivalence and isomorphism of functors in categories.
15
Why are outlines so essential?
12
Confused by proof of the irrationality of root 2: if $p^2$ is divisible by $2$, then so is $p$.
12
How to prove that there exist no functions $f,g:\Bbb{R}\to\Bbb{R}$ such that $f(g(x))=x^{2018}$ and $g(f(x))=x^{2019}$?
11
Show that $d(x,y) = \cos(x-y) + 3$ for $x \ne y$ is a metric.

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