List questions from exact-sequence

Published on 02 Oct 2014 - 14:28

84

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Modules that allow an infinite exact sequence on them

Published on 03 Oct 2014 - 15:52

104

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Central extension: $Hom(Q,Z) \cong$ automorphisms of $G$ acting trivially on subgroup and quotient?

Published on 03 Oct 2014 - 19:51

422

Views

relationship between Exact sequences and Universal mapping property

Published on 25 Mar 2026 - 20:33

815

Views

Reference request for Homology Gysin sequence.

Published on 08 Oct 2014 - 17:23

17

Views

Construction of splittings

Published on 08 Oct 2014 - 19:37

877

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If $0 \to M \to N \to S \to 0$ splits, then $N \cong M \oplus S$

Published on 15 Oct 2014 - 22:23

55

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First function in a short exact sequence

Published on 18 Oct 2014 - 11:01

227

Views

torsion of a module and exactness

Published on 18 Oct 2014 - 17:49

943

Views

Pullback and Kernel

Published on 21 Oct 2014 - 13:42

545

Views

Directs sum in exact sequences

Published on 22 Oct 2014 - 10:59

80

Views

Help on formalisation proof of the triviality of a kernel in Mayer-Vietoris

Published on 23 Oct 2014 - 20:22

175

Views

Kernel of a retraction

Published on 28 Oct 2014 - 12:54

47

Views

Does exactness in each variable coincide with exactness of the product?

Published on 29 Oct 2014 - 4:59

658

Views

Exact sequence of $A$-modules

Published on 01 Nov 2014 - 17:55

List Question

exact sequence with infinite element

Modules that allow an infinite exact sequence on them

Central extension: $Hom(Q,Z) \cong$ automorphisms of $G$ acting trivially on subgroup and quotient?

relationship between Exact sequences and Universal mapping property

Reference request for Homology Gysin sequence.

Construction of splittings

If $0 \to M \to N \to S \to 0$ splits, then $N \cong M \oplus S$

First function in a short exact sequence

torsion of a module and exactness

Pullback and Kernel

Directs sum in exact sequences

Help on formalisation proof of the triviality of a kernel in Mayer-Vietoris

Kernel of a retraction

Does exactness in each variable coincide with exactness of the product?

Exact sequence of $A$-modules

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