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SashaP
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35
Crux of Dwork's proof of rationality of the zeta function?
Sep 10, 2016
question
32
Etale cohomology can not be computed by Cech
Sep 23, 2016
question
24
Is the $H$-space structure on $S^7$ associative up to homotopy?
Dec 3, 2016
answer
17
Commutative ring $R$ with no nontrivial idempotents, with a localization $R_r$ with infinitely many idempotents
Apr 21, 2020
question
15
Lower central series quotients in terms of (co)homology
Apr 17, 2016
question
14
Local proof of Grothendieck-Riemann-Roch theorem
May 21, 2016
answer
12
Question on the Sato-Tate conjecture
Oct 10, 2016
answer
12
Are "large enough" finite etale covers arithmetic?
Jun 27, 2020
answer
11
Printing omission in Mumford's "Lectures on Curves on an Algebraic Surface"
Dec 1, 2016
answer
11
Can non-split extension be isomorphic to the split one as objects
Nov 17, 2020
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14
Show that a field extension $L/K$ is separable iff the trace form is non-degenerate.
8
Any hyperelliptic curve is never a complete intersection.
5
Metric limit and limit in category
5
Quadratic field, $O_K/\mathfrak{p} = \mathbb{F}_p$, $O_K/pO_K$ is a finite field of order $p^2$.
5
Zeta function, $\mathbb{F}_5[T, \sqrt{T(T-1)(T+1)}]$