Question

Uniqueness of amalgation when proving that presheaves are sheaves for the trivial topology

score 39 · Answer 1 · 2021-06-17 18:24:17

39

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Uniqueness of amalgation when proving that presheaves are sheaves for the trivial topology

Published on 17 Jun 2021 - 18:24

score 106 · Answer 2 · 2021-07-02 13:39:51

106

Views

Can any Grothendieck topos be presented by a singleton coverage?

Published on 02 Jul 2021 - 13:39

score 95 · Answer 3 · 2021-08-14 15:51:36

95

Views

Definition of Grothendieck topology

Published on 14 Aug 2021 - 15:51

score 158 · Answer 4 · 2026-03-25 12:50:03

158

Views

meaning of sentence that a "presheaf/K-theory satisfies descent on a Grothendieck site"

Published on 25 Mar 2026 - 12:50

score 156 · Answer 5 · 2021-11-09 03:35:02

156

Views

global section of inverse image and etale cohomology

Published on 09 Nov 2021 - 3:35

score 114 · Answer 6 · 2022-05-11 13:09:33

114

Views

How to generate Grothendieck Topologies from families of sieves

Published on 11 May 2022 - 13:09

score 96 · Answer 7 · 2022-06-29 22:47:11

96

Views

Compatibility of pullbacks with an equivalence relation

Published on 29 Jun 2022 - 22:47

score 53 · Answer 8 · 2022-07-08 08:55:50

53

Views

Some questions on Grothendieck topologies

Published on 08 Jul 2022 - 8:55

score 61 · Answer 9 · 2022-07-10 04:26:26

61

Views

Is there a notion of "base" $\mathcal{B}$ for a site, and "$\mathcal{B}$-sheaf", such that a presheaf is a sheaf iff it is a "$\mathcal{B}$-sheaf"?

Published on 10 Jul 2022 - 4:26

score 63 · Answer 10 · 2022-07-11 19:54:46

63

Views

Attempting to prove a certain assignment of sieves on Top gives a Grothendieck topology

Published on 11 Jul 2022 - 19:54

score 68 · Answer 11 · 2022-07-11 21:16:33

68

Views

What is the Grothendieck topology used for the site of open subsets of Euclidean spaces, in the definition of a diffeology?

Published on 11 Jul 2022 - 21:16

score 46 · Answer 12 · 2022-07-13 15:30:03

46

Views

If $T$ is continuous and $F$ is a sheaf (on a general site) then is $TF$ always also a sheaf?

Published on 13 Jul 2022 - 15:30

score 56 · Answer 13 · 2026-03-20 19:42:01

56

Views

Does the standard Grothendieck topology on topological spaces, push down to the homotopy category?

Published on 20 Mar 2026 - 19:42

score 55 · Answer 14 · 2022-07-28 16:36:03

55

Views

What is the appropriate $(\infty,1)$-site structure on SmoothMfld, making the de Rham complex a $D(\mathbb{R})$-valued $(\infty,1)$-sheaf?

Published on 28 Jul 2022 - 16:36

score 61 · Answer 15 · 2022-07-29 17:40:48

61

Views

Confusion about nLab's definition of smooth $\infty$-groupoid

Published on 29 Jul 2022 - 17:40

List Question

Uniqueness of amalgation when proving that presheaves are sheaves for the trivial topology

Can any Grothendieck topos be presented by a singleton coverage?

Definition of Grothendieck topology

meaning of sentence that a "presheaf/K-theory satisfies descent on a Grothendieck site"

global section of inverse image and etale cohomology

How to generate Grothendieck Topologies from families of sieves

Compatibility of pullbacks with an equivalence relation

Some questions on Grothendieck topologies

Is there a notion of "base" $\mathcal{B}$ for a site, and "$\mathcal{B}$-sheaf", such that a presheaf is a sheaf iff it is a "$\mathcal{B}$-sheaf"?

Attempting to prove a certain assignment of sieves on Top gives a Grothendieck topology

What is the Grothendieck topology used for the site of open subsets of Euclidean spaces, in the definition of a diffeology?

If $T$ is continuous and $F$ is a sheaf (on a general site) then is $TF$ always also a sheaf?

Does the standard Grothendieck topology on topological spaces, push down to the homotopy category?

What is the appropriate $(\infty,1)$-site structure on SmoothMfld, making the de Rham complex a $D(\mathbb{R})$-valued $(\infty,1)$-sheaf?

Confusion about nLab's definition of smooth $\infty$-groupoid

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