List questions from group-actions

Published on 20 Jun 2017 - 12:20

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What is difference between free and faithful group action?

Published on 20 Jun 2017 - 12:52

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Permuting orbits

Published on 25 Jun 2017 - 18:14

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Non-trivial group action with trivial action of maximal torus?

Published on 27 Jun 2017 - 6:52

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Orbits by Lie subgroup

Published on 02 Apr 2026 - 1:39

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Injectivity of map induced by covering $p:E\longrightarrow B$

Published on 29 Jun 2017 - 18:08

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Free action of a group and orbits

Published on 29 Jun 2017 - 18:30

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$S_n$ action on the power set of a set with $n - 1$ elements.

Published on 04 Apr 2026 - 6:11

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Group generated by actions.

Published on 04 Jul 2017 - 23:06

35

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Let $G$ act smoothly on $M$, $(g,m) \rightarrow t_g (m) $ from the left. Why is $t_g \simeq id $ if $G$ connected?

Published on 25 Mar 2026 - 13:13

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On left and right group actions

Published on 27 Mar 2026 - 18:26

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Continuous group action of $SO(2)$ on $\mathbb{R}^2$

Published on 09 Jul 2017 - 8:23

71

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How can I compute the presentation of a finite group quotient of a quasiprojective variety?

Published on 03 Apr 2026 - 0:24

56

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Proving that $PGL(n,\mathbb R)$ takes collinear points to collinear points.

Published on 26 Mar 2026 - 12:58

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group action and automorphism of a group

Published on 12 Jul 2017 - 9:54

List Question

Translation morphism is not a homomorphism? Why does the inverse appear?

What is difference between free and faithful group action?

Permuting orbits

Non-trivial group action with trivial action of maximal torus?

Orbits by Lie subgroup

Injectivity of map induced by covering $p:E\longrightarrow B$

Free action of a group and orbits

$S_n$ action on the power set of a set with $n - 1$ elements.

Group generated by actions.

Let $G$ act smoothly on $M$, $(g,m) \rightarrow t_g (m) $ from the left. Why is $t_g \simeq id $ if $G$ connected?

On left and right group actions

Continuous group action of $SO(2)$ on $\mathbb{R}^2$

How can I compute the presentation of a finite group quotient of a quasiprojective variety?

Proving that $PGL(n,\mathbb R)$ takes collinear points to collinear points.

group action and automorphism of a group

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