Question

Two questions on homotopy sequence for étale fundamental groups

score 321 · Answer 1 · 2026-03-26 04:51:09

321

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Two questions on homotopy sequence for étale fundamental groups

Published on 26 Mar 2026 - 4:51

score 299 · Answer 2 · 2026-03-26 09:51:26

299

Views

Size of fibers versus degrees of residue fields in a morphism of affine schemes

Published on 26 Mar 2026 - 9:51

score 111 · Answer 3 · 2026-03-30 13:23:01

111

Views

Interesting results of Schemes through Theory of Sheaves

Published on 30 Mar 2026 - 13:23

score 697 · Answer 4 · 2016-08-29 14:42:18

697

Views

Proving Deligne's formula

Published on 29 Aug 2016 - 14:42

score 243 · Answer 5 · 2026-03-25 19:01:18

243

Views

Divisor on an arithmetic surface and "base change"

Published on 25 Mar 2026 - 19:01

score 358 · Answer 6 · 2026-03-25 06:03:58

358

Views

Inequalities can be turned into equations - semi-algebraic varieties turned into $\mathbb{R}$-schemes?

Published on 25 Mar 2026 - 6:03

score 454 · Answer 7 · 2026-03-25 19:01:17

454

Views

Rational Maps from Scheme to Projective Space

Published on 25 Mar 2026 - 19:01

score 94 · Answer 8 · 2026-03-30 13:20:11

94

Views

Why is every $f_*\mathcal{O}_X$-module also an $\mathcal{O}_X$-module?

Published on 30 Mar 2026 - 13:20

score 304 · Answer 9 · 2026-03-26 09:51:25

304

Views

Affine Scheme of the form $X=Spec(R)$ for $R$ commutative ring, as the analogue of an affine variety $X$ with coordinate ring $R$

Published on 26 Mar 2026 - 9:51

score 212 · Answer 10 · 2026-03-30 04:55:51

212

Views

Why is $ \pi^{-1} (U) $ an affine open set in $ E $, with coordinate ring : $ \mathrm{Sym}_A \Gamma ( U , \mathcal{E}^{ \vee } ) $?

Published on 30 Mar 2026 - 4:55

score 160 · Answer 11 · 2026-03-25 16:08:39

160

Views

Why is $f^!\mathcal{G}$ a quasi-coherent $\mathcal{O}_X$-module?

Published on 25 Mar 2026 - 16:08

score 559 · Answer 12 · 2016-09-23 09:16:29

559

Views

Local-freeness of the Hodge bundle

Published on 23 Sep 2016 - 9:16

score 659 · Answer 13 · 2016-09-23 18:52:09

659

Views

Why are proper morphisms restricted to those of finite type?

Published on 23 Sep 2016 - 18:52

score 509 · Answer 14 · 2026-03-26 08:14:51

509

Views

Finding a distinguished open set in the intersection of two $\operatorname{Spec}$s

Published on 26 Mar 2026 - 8:14

score 150 · Answer 15 · 2026-03-25 12:17:52

150

Views

Proving $\operatorname{Spec} k[x]$ is internally a ring of fractions in the internal language of the Zariski topos

Published on 25 Mar 2026 - 12:17

List Question

Two questions on homotopy sequence for étale fundamental groups

Size of fibers versus degrees of residue fields in a morphism of affine schemes

Interesting results of Schemes through Theory of Sheaves

Proving Deligne's formula

Divisor on an arithmetic surface and "base change"

Inequalities can be turned into equations - semi-algebraic varieties turned into $\mathbb{R}$-schemes?

Rational Maps from Scheme to Projective Space

Why is every $f_*\mathcal{O}_X$-module also an $\mathcal{O}_X$-module?

Affine Scheme of the form $X=Spec(R)$ for $R$ commutative ring, as the analogue of an affine variety $X$ with coordinate ring $R$

Why is $ \pi^{-1} (U) $ an affine open set in $ E $, with coordinate ring : $ \mathrm{Sym}_A \Gamma ( U , \mathcal{E}^{ \vee } ) $?

Why is $f^!\mathcal{G}$ a quasi-coherent $\mathcal{O}_X$-module?

Local-freeness of the Hodge bundle

Why are proper morphisms restricted to those of finite type?

Finding a distinguished open set in the intersection of two $\operatorname{Spec}$s

Proving $\operatorname{Spec} k[x]$ is internally a ring of fractions in the internal language of the Zariski topos

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