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15
Math.TechQA.Club
2026-04-13 15:25:49
39
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Criterion for principal opens to form an open cover: why does $V\subseteq\bigcup_{f\in S} Z_f\iff\langle S\rangle=k[V]$?
Published on
13 Apr 2026 - 15:25
#algebraic-geometry
1.2k
Views
Why does a ring homomorphism induce a continuous map between spectra?
Published on
30 Apr 2026 - 8:10
#algebraic-geometry
#commutative-algebra
1.8k
Views
Hartshorne's Exercise II. 2.15 (fully faithful functor)
Published on
15 Apr 2026 - 9:38
#algebraic-geometry
#category-theory
#schemes
2.1k
Views
What is an étale covering
Published on
09 Apr 2026 - 9:39
#algebraic-geometry
173
Views
How to exhibit an étale cover of a surfaces.
Published on
11 Apr 2026 - 8:00
#algebraic-geometry
1k
Views
Recommendations for Commutative Algebra Software?
Published on
12 Apr 2026 - 11:57
#algebraic-geometry
#commutative-algebra
#math-software
78
Views
deformation space inside cohomology
Published on
10 May 2026 - 19:04
#algebraic-geometry
#complex-geometry
#deformation-theory
1.2k
Views
Roadmap to Riemann hypothesis for curves over finite fields
Published on
15 May 2026 - 15:09
#algebraic-geometry
#reference-request
#algebraic-curves
1.1k
Views
Three meanings of étale sheaf on X
Published on
10 May 2026 - 15:09
#algebraic-geometry
#etale-cohomology
#algebraic-stacks
134
Views
Why is $\text{Mor}_{\mathrm{reg}}(*,W)\to \text{Hom}_{k-\mathrm{alg}}(k[W],k[*])$ not surjective when $W=\mathbb{A}^2\setminus\{(0,0)\}$.
Published on
14 Apr 2026 - 5:51
#algebraic-geometry
#affine-geometry
1k
Views
Pre- and post-multiplication by diagonal matrices
Published on
15 Apr 2026 - 11:03
#linear-algebra
#algebraic-geometry
466
Views
Irreducible polynomial and the zero set of its derivative
Published on
25 Mar 2026 - 22:03
#algebraic-geometry
#several-complex-variables
197
Views
Two definitions of "affine stratification"
Published on
10 Apr 2026 - 3:06
#algebraic-geometry
#definition
147
Views
(Reference Request) Desingularization of Fibrations
Published on
15 May 2026 - 15:07
#algebraic-geometry
#reference-request
#algebraic-curves
919
Views
Projective morphism defined by linear systems
Published on
12 Apr 2026 - 18:44
#algebraic-geometry
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