Question

Real-world examples of perverse sheaves

score 83 · Answer 1 · 2023-09-23 13:39:01

83

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Real-world examples of perverse sheaves

Published on 23 Sep 2023 - 13:39

score 166 · Answer 2 · 2023-09-24 09:49:15

166

Views

The intersection of $\mathcal{O}_X$-submodules is an intersection as the categorical sense?

Published on 24 Sep 2023 - 9:49

score 67 · Answer 3 · 2023-09-25 22:09:22

67

Views

Why is $ \mathfrak{Mod}(A_{Y}/f) $ a thick subcategory of $\mathfrak{Mod}(A_{Y})$?

Published on 25 Sep 2023 - 22:09

score 82 · Answer 4 · 2023-09-26 11:10:36

82

Views

(Interlude) Question for fun : What would be simplest way of proving "a presheaf isomorphic to a sheaf is also sheaf"

Published on 26 Sep 2023 - 11:10

score 74 · Answer 5 · 2026-03-26 07:33:49

74

Views

Structure sheaf of the projectivization of a bundle

Published on 26 Mar 2026 - 7:33

score 92 · Answer 6 · 2023-09-26 15:52:03

92

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Etale Stalks of the Hom sheaf

Published on 26 Sep 2023 - 15:52

score 21 · Answer 7 · 2023-09-29 08:47:07

21

Views

Proof verification of support of $\widetilde{M}$ equal to $V(\text{Ann(M)})$ for finitely generated $M$

Published on 29 Sep 2023 - 8:47

score 136 · Answer 8 · 2023-10-02 15:24:46

136

Views

Tensor of globally generated is globally generated

Published on 02 Oct 2023 - 15:24

score 50 · Answer 9 · 2023-10-06 08:13:02

50

Views

presheaf of nilpotent element of the structure sheaf of a scheme

Published on 06 Oct 2023 - 8:13

score 85 · Answer 10 · 2026-03-30 14:55:26

85

Views

Hom of sheafification

Published on 30 Mar 2026 - 14:55

score 29 · Answer 11 · 2026-03-26 09:41:51

29

Views

Relations between (the category of étale sheaves over $X$) and (the category of étale sheaves over a model of $X$)

Published on 26 Mar 2026 - 9:41

score 47 · Answer 12 · 2026-03-29 21:54:02

47

Views

Additivity of Kodaira dimension for projective varieties

Published on 29 Mar 2026 - 21:54

score 81 · Answer 13 · 2023-10-14 14:10:59

81

Views

Is $\mathcal E\to f_f^\mathcal E$ an isomorphism for $\mathcal E$ a free sheaf?

Published on 14 Oct 2023 - 14:10

score 46 · Answer 14 · 2023-10-15 20:36:35

46

Views

If the restriction of a differential form to a closed submanifold is closed, is the form itself closed?

Published on 15 Oct 2023 - 20:36

score 44 · Answer 15 · 2026-02-23 07:00:20

44

Views

Closed subspace cut off by the ideal sheaf coming from a locally closed immersion

Published on 23 Feb 2026 - 7:00

List Question

Real-world examples of perverse sheaves

The intersection of $\mathcal{O}_X$-submodules is an intersection as the categorical sense?

Why is $ \mathfrak{Mod}(A_{Y}/f) $ a thick subcategory of $\mathfrak{Mod}(A_{Y})$?

(Interlude) Question for fun : What would be simplest way of proving "a presheaf isomorphic to a sheaf is also sheaf"

Structure sheaf of the projectivization of a bundle

Etale Stalks of the Hom sheaf

Proof verification of support of $\widetilde{M}$ equal to $V(\text{Ann(M)})$ for finitely generated $M$

Tensor of globally generated is globally generated

presheaf of nilpotent element of the structure sheaf of a scheme

Hom of sheafification

Relations between (the category of étale sheaves over $X$) and (the category of étale sheaves over a model of $X$)

Additivity of Kodaira dimension for projective varieties

Is $\mathcal E\to f_f^\mathcal E$ an isomorphism for $\mathcal E$ a free sheaf?

If the restriction of a differential form to a closed submanifold is closed, is the form itself closed?

Closed subspace cut off by the ideal sheaf coming from a locally closed immersion

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