List questions from group-extensions

Published on 02 Sep 2013 - 10:29

291

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Extension of divisible abelian group

Published on 12 Sep 2013 - 15:01

252

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A short exact sequence of groups

Published on 17 Sep 2013 - 17:37

124

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Are there any non-trivial group extensions of $SU(N)$?

Published on 04 May 2017 - 18:19

652

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Example of disconnected Lie groups with finite extensions

Published on 08 May 2017 - 15:27

35

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Group extensions rational matrices by infinite cyclic squared

Published on 26 May 2017 - 16:49

493

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group extension with finite abelian group

Published on 29 Jun 2017 - 14:37

1.3k

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Central extensions versus semidirect products

Published on 26 Mar 2026 - 3:49

309

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Extensions to a homomorphism

Published on 15 Aug 2017 - 3:38

687

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central extension of $\mathbb Z_3$ by $\mathbb Z_3$

Published on 22 Aug 2017 - 17:14

505

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Largest abelian subgroup

Published on 25 Sep 2017 - 2:20

55

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Fundamental group of $\mathbb{R}P^2\sharp \mathbb{R}P^2$

Published on 25 Sep 2017 - 8:31

160

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Extensions of finite groups by compact Lie groups

Published on 11 Jan 2018 - 21:16

198

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A question on group extensions

Published on 22 Aug 2011 - 15:43

2.5k

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Group extensions of cyclic groups

Published on 30 Aug 2011 - 8:31

List Question

On the element $2\in\mathrm{Ext}(\mathbb Z/4,\mathbb Z)$.

Extension of divisible abelian group

A short exact sequence of groups

Are there any non-trivial group extensions of $SU(N)$?

Example of disconnected Lie groups with finite extensions

Group extensions rational matrices by infinite cyclic squared

group extension with finite abelian group

Central extensions versus semidirect products

Extensions to a homomorphism

central extension of $\mathbb Z_3$ by $\mathbb Z_3$

Largest abelian subgroup

Fundamental group of $\mathbb{R}P^2\sharp \mathbb{R}P^2$

Extensions of finite groups by compact Lie groups

A question on group extensions

Group extensions of cyclic groups

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