List questions from group-actions

Published on 01 Apr 2026 - 1:13

111

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action of $O(n,\mathbb{R})$ on ${S}^{n-1}$

Published on 11 Aug 2013 - 18:30

168

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$G$-set terminology

Published on 13 Aug 2013 - 10:51

3.8k

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Number of Orbits in Group Action

Published on 13 Aug 2013 - 18:03

1.5k

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Left regular action isomorphic to the right regular action

Published on 18 Aug 2013 - 5:58

666

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A group action contains another action as a normal subgroup

Published on 18 Aug 2013 - 6:27

82

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Prove that $ \pi_g $ is a permutation

Published on 19 Aug 2013 - 23:14

730

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Proving Sylow's first theorem

Published on 21 Aug 2013 - 15:32

601

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Diagonal groups and semidirect products

Published on 24 Aug 2013 - 4:46

419

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Triviality of the principal fiber bundle obtained from quotienting a manifold by a free and proper action

Published on 29 Mar 2026 - 11:06

374

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Fundamental group of a space under a group action

Published on 31 Mar 2026 - 21:00

310

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Configurations of N tiles on MxM grid, up to rotation/translation?

Published on 27 Mar 2026 - 19:44

10.9k

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$Q_8$ is isomorphic to a subgroup of $S_8$, but not isomorphic to a subgroup of $S_n$ for $n\leq 7$.

Published on 02 Sep 2013 - 9:39

2.2k

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left regular representation(group action) of a finite group $G$ Dummit Foote 4.2.11

Published on 05 Sep 2013 - 7:10

403

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What does it mean for a group to "act algebraically"?

Published on 05 Sep 2013 - 11:07

List Question

boundary of word-hyperbolic group

action of $O(n,\mathbb{R})$ on ${S}^{n-1}$

$G$-set terminology

Number of Orbits in Group Action

Left regular action isomorphic to the right regular action

A group action contains another action as a normal subgroup

Prove that $ \pi_g $ is a permutation

Proving Sylow's first theorem

Diagonal groups and semidirect products

Triviality of the principal fiber bundle obtained from quotienting a manifold by a free and proper action

Fundamental group of a space under a group action

Configurations of N tiles on MxM grid, up to rotation/translation?

$Q_8$ is isomorphic to a subgroup of $S_8$, but not isomorphic to a subgroup of $S_n$ for $n\leq 7$.

left regular representation(group action) of a finite group $G$ Dummit Foote 4.2.11

What does it mean for a group to "act algebraically"?

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