List questions from group-actions

Published on 21 Mar 2026 - 22:10

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Orbits of the action of $G$ on $\Omega × \Omega$

Published on 17 Mar 2026 - 10:23

91

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Is the quotient of a tensor product by a group a free module

Published on 23 Mar 2026 - 2:04

46

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Compact group acting on compact set s.t. orbit of net converges

Published on 16 Feb 2018 - 10:55

64

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Does a finite $SU(2,q^2)$ act transitively on the set of rays?

Published on 17 Feb 2018 - 17:03

46

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Sufficient conditions for testing putative primary and secondary invariants

Published on 22 Mar 2026 - 13:02

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How much of a group $G$ is determined by the category of $G$-sets?

Published on 22 Feb 2018 - 17:03

41

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G-groups homomorphism regarding the subgroup fixed by G

Published on 23 Mar 2026 - 8:41

267

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A group action seen as a functor is representable iff for every $x,y \in A$ there is exactly one $g \in G$ such that $gx=y$.

Published on 24 Feb 2018 - 5:07

101

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Group of order 81 acting faithfully on a set of order 9

Published on 24 Feb 2018 - 16:15

57

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Number of orbits of the natural action of order preserving bijections of $\mathbb Q$ on $\mathbb Q^n$

Published on 22 Mar 2026 - 13:40

151

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$|G|<\infty$ and $|X|<\infty$ a $G$-set $\Rightarrow \bigcap_{g \in G}Fix(g)\not= \emptyset$

Published on 03 Mar 2018 - 8:57

506

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Quotient metric on a complete Riemannian manifold

Published on 22 Mar 2026 - 20:02

81

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Minimum size of subgroup

Published on 22 Mar 2026 - 0:12

125

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example on equivariant cohomology

Published on 17 Mar 2026 - 5:13

List Question

Primitive of a Group Action

Orbits of the action of $G$ on $\Omega × \Omega$

Is the quotient of a tensor product by a group a free module

Compact group acting on compact set s.t. orbit of net converges

Does a finite $SU(2,q^2)$ act transitively on the set of rays?

Sufficient conditions for testing putative primary and secondary invariants

How much of a group $G$ is determined by the category of $G$-sets?

G-groups homomorphism regarding the subgroup fixed by G

A group action seen as a functor is representable iff for every $x,y \in A$ there is exactly one $g \in G$ such that $gx=y$.

Group of order 81 acting faithfully on a set of order 9

Number of orbits of the natural action of order preserving bijections of $\mathbb Q$ on $\mathbb Q^n$

$|G|<\infty$ and $|X|<\infty$ a $G$-set $\Rightarrow \bigcap_{g \in G}Fix(g)\not= \emptyset$

Quotient metric on a complete Riemannian manifold

Minimum size of subgroup

example on equivariant cohomology

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