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Gabriel
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26
Elementary proof that $|x|^p$ is convex.
Mar 23, 2017
17
Coherent sheaves vs sheaves locally of finite presentation
Dec 27, 2020
16
What is the "dimension" of a locally ringed space?
Oct 28, 2020
14
False proof that every continuous function is holomorphic
Sep 2, 2018
13
Localization commutes with arbitrary direct sums
Oct 9, 2019
12
Let $A$ and $x$ be $n \times n$ and $n \times 1$ matrices, all entries real and strictly positive. Assume that $A^2 x = x$. Show that $A x = x$.
Jul 2, 2016
10
Horrible limit envolving floor function
Dec 15, 2018
10
When is $\operatorname{Spec} A^G \cong (\operatorname{Spec} A)/G$ true?
Jul 25, 2021
9
Why is the kernel of an integral transform called kernel?
Sep 8, 2016
9
Categorical definition of Spectrum of a ring as a colimit?
Jul 12, 2020
Top network posts
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37
Using algebraic geometry to understand class field theory
27
Why stable $\infty$-categories?
26
Is there a proof of Hodge theory using condensed mathematics?
24
Why should an algebraic geometer care about singular / simplicial (co)homology?
23
Is there a ring stacky approach to $\ell$-adic or rigid cohomology?