List questions from group-extensions

Published on 25 Mar 2026 - 0:53

392

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Algebraic Extensions of Z_7 with polynomials?

Published on 31 May 2020 - 21:09

60

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Show that the group in the center of this short exact sequence is abelian

Published on 28 Jul 2020 - 23:19

309

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Properties of group extensions

Published on 12 Jul 2016 - 10:30

47

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What does extend a group by a map mean?

Published on 20 Jul 2016 - 2:30

194

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Equivalent conditions for an exact sequence of groups being split

Published on 21 Aug 2016 - 6:14

157

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Describe all extension groups of a given subgroup $H \trianglelefteq \mathrm{Heis}(\mathbb F_q)$ by $\mathrm{Heis}(\mathbb F_q)/H$

Published on 03 Sep 2016 - 23:45

144

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Commutative diagram of semidirect products

Published on 22 Sep 2016 - 15:14

78

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How to classify the extensions of $A_4$ by $Z / 2Z$?

Published on 26 Sep 2016 - 18:18

31

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When does a morphism $f:X \to C$ from a group extension $X \twoheadrightarrow G$ factor through $G$?

Published on 25 Nov 2016 - 12:04

24

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Are fixed points of complements have same size?

Published on 28 Nov 2016 - 19:23

94

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Isomorphic Group Extensions

Published on 02 Dec 2016 - 19:27

170

Views

Are extensions quasi-isometric

Published on 04 Dec 2016 - 21:33

126

Views

Meaning of $\phi_h$ in outer semidirect product

Published on 24 Dec 2016 - 16:09

490

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Residually finite extension of a finite group

Published on 02 Jan 2017 - 16:12

List Question

Finite index subgroups of group extensions such that the quotient map is injective

Algebraic Extensions of Z_7 with polynomials?

Show that the group in the center of this short exact sequence is abelian

Properties of group extensions

What does extend a group by a map mean?

Equivalent conditions for an exact sequence of groups being split

Describe all extension groups of a given subgroup $H \trianglelefteq \mathrm{Heis}(\mathbb F_q)$ by $\mathrm{Heis}(\mathbb F_q)/H$

Commutative diagram of semidirect products

How to classify the extensions of $A_4$ by $Z / 2Z$?

When does a morphism $f:X \to C$ from a group extension $X \twoheadrightarrow G$ factor through $G$?

Are fixed points of complements have same size?

Isomorphic Group Extensions

Are extensions quasi-isometric

Meaning of $\phi_h$ in outer semidirect product

Residually finite extension of a finite group

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