List questions from fibre-product

58

Views

If $h_u \times_G F$ is representable for every $u \in \text{Ob}(C)$ and $G$ is representable then so is $F$.

Published on 31 May 2017 - 16:46

608

Views

Short exact sequence of topological groups which is split, but not topologically split

Published on 28 Jun 2017 - 23:08

30

Views

Generalizing the Chinese remainder theorem with fibred products

Published on 15 Jul 2017 - 14:21

131

Views

Abstract deformations of affine schemes are affine?

Published on 18 Jul 2017 - 18:40

116

Views

fibered product or quotient group?

Published on 30 Jul 2017 - 21:22

1.1k

Views

Fiber Product is an embedded submanifold

Published on 04 Oct 2017 - 17:59

479

Views

Fibred product of a (vector bundle) set with itself

Published on 29 Nov 2017 - 0:48

147

Views

differentials and tangent space of a fibre

Published on 02 Aug 2020 - 7:12

156

Views

fibre with only one point is isomorphic to the spec of a field

Published on 19 Aug 2020 - 12:28

165

Views

The automorphism scheme of a fibered surface

Published on 11 Oct 2020 - 23:19

29

Views

$X$ is finite connected $n$-dimensional CW complex and $A = M_k(C(X))$.

Published on 23 Nov 2020 - 22:44

418

Views

Underlying topological spaces of scheme theoretic fibre products

Published on 10 Dec 2020 - 12:02

368

Views

inverse image of fiber product of scheme

Published on 21 Dec 2020 - 12:45

72

Views

Is the image of a curve under the projection morphism of a fiber product again a curve?

Published on 24 Feb 2021 - 19:28

106

Views

Johnstone's Topos Theory, Lemma 0.17 - the lower-right square is a pushout, proof help.

Published on 17 Jul 2021 - 0:53

List Question

If $h_u \times_G F$ is representable for every $u \in \text{Ob}(C)$ and $G$ is representable then so is $F$.

Short exact sequence of topological groups which is split, but not topologically split

Generalizing the Chinese remainder theorem with fibred products

Abstract deformations of affine schemes are affine?

fibered product or quotient group?

Fiber Product is an embedded submanifold

Fibred product of a (vector bundle) set with itself

differentials and tangent space of a fibre

fibre with only one point is isomorphic to the spec of a field

The automorphism scheme of a fibered surface

$X$ is finite connected $n$-dimensional CW complex and $A = M_k(C(X))$.

Underlying topological spaces of scheme theoretic fibre products

inverse image of fiber product of scheme

Is the image of a curve under the projection morphism of a fiber product again a curve?

Johnstone's Topos Theory, Lemma 0.17 - the lower-right square is a pushout, proof help.

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