List questions from group-actions

Published on 29 Apr 2026 - 12:20

402

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Showing a group G acts on itself by right multiplication

Published on 03 May 2026 - 8:59

177

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$N\trianglelefteq G$, $A$ a conjugacy class in $G$ such that $A\subseteq N$, prove $A$ is a union of conjugacy classes

Published on 07 May 2026 - 20:30

690

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Show that the additive group $\mathbb{Z}$ acts on itself by $xy = x+y$ and find all $x\in\mathbb{Z}$ such that $xy = y$ for all $y\in\mathbb{Z}$.

Published on 10 May 2026 - 10:12

71

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Number of different k-coloring of an $n\times m$ grid up to rows and columns permutations

Published on 04 May 2026 - 4:03

65

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How to embed $F_q^\times $ in $S_n$?

Published on 03 May 2026 - 8:56

79

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orbit representatives for the group of unipotent matrix acting on the set of skew-symmetric matrices

Published on 05 May 2026 - 1:02

80

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$S_n$ right-action on $V^{\otimes n}$

Published on 07 May 2026 - 19:49

796

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Interpretation of wreath products in general and on symmetric groups

Published on 29 Apr 2026 - 12:42

66

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Regarding action of a group factoring through

Published on 29 Apr 2026 - 12:42

264

Views

Fuchsian group acts properly discontinuously, Orbit Space is a Riemann Surface

Published on 05 May 2026 - 6:19

31

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When does an action on $X$ makes an well defined action on $L^{\infty}(X)$?

Published on 29 Apr 2026 - 12:46

124

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Transitive action

Published on 23 Apr 2026 - 4:17

98

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Continuity of a real function defined on an orbit space

Published on 29 Apr 2026 - 12:46

122

Views

Show that $A_5$ has no subgroup of order $20$.

Published on 29 Apr 2026 - 12:46

List Question

Orbit counting lemma hexagon

Showing a group G acts on itself by right multiplication

$N\trianglelefteq G$, $A$ a conjugacy class in $G$ such that $A\subseteq N$, prove $A$ is a union of conjugacy classes

Show that the additive group $\mathbb{Z}$ acts on itself by $xy = x+y$ and find all $x\in\mathbb{Z}$ such that $xy = y$ for all $y\in\mathbb{Z}$.

Number of different k-coloring of an $n\times m$ grid up to rows and columns permutations

How to embed $F_q^\times $ in $S_n$?

orbit representatives for the group of unipotent matrix acting on the set of skew-symmetric matrices

$S_n$ right-action on $V^{\otimes n}$

Interpretation of wreath products in general and on symmetric groups

Regarding action of a group factoring through

Fuchsian group acts properly discontinuously, Orbit Space is a Riemann Surface

When does an action on $X$ makes an well defined action on $L^{\infty}(X)$?

Transitive action

Continuity of a real function defined on an orbit space

Show that $A_5$ has no subgroup of order $20$.

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