List questions from group-actions

Published on 24 Jun 2016 - 6:07

231

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Need help in understanding a certain step of a certain proof in finite group theory and group actions

Published on 27 Mar 2026 - 13:47

44

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Not getting how to prove reverse hypothesis.

Published on 27 Jun 2016 - 9:34

91

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How to find the invariant forms of a finite group

Published on 26 Mar 2026 - 21:27

692

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The action of automorphisms on the Riemann sphere

Published on 29 Jun 2016 - 21:50

241

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Group action on algebra over a field defined on generators

Published on 30 Jun 2016 - 16:48

98

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The set of prime ideals, whose contraction is a fixed prime in the ring of invariants, is finite.

Published on 30 Jun 2016 - 19:03

234

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Properly discontinuous group actions - Hausdorffness

Published on 01 Jul 2016 - 20:41

95

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Group action with two normal subgroups which induce same block system

Published on 04 Jul 2016 - 10:42

122

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Homsets of group actions related to fixed points

Published on 31 Mar 2013 - 19:05

75

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Equiv Relation of Orbits - Group Action

Published on 03 Apr 2013 - 19:31

176

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Conjugation on subgroups of $A_4$ faithful?

Published on 04 Apr 2013 - 14:54

339

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A question about quotient under group action

Published on 31 Mar 2026 - 22:50

865

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Show that the orbits of $S_n$ under the conjugation action of $S_n$ on itself correspond 1-1 with the cycle types.

Published on 07 Apr 2013 - 20:55

172

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Different actions of an affine primitive group?

Published on 18 Apr 2013 - 4:36

List Question

Categorical Quotient and group actions

Need help in understanding a certain step of a certain proof in finite group theory and group actions

Not getting how to prove reverse hypothesis.

How to find the invariant forms of a finite group

The action of automorphisms on the Riemann sphere

Group action on algebra over a field defined on generators

The set of prime ideals, whose contraction is a fixed prime in the ring of invariants, is finite.

Properly discontinuous group actions - Hausdorffness

Group action with two normal subgroups which induce same block system

Homsets of group actions related to fixed points

Equiv Relation of Orbits - Group Action

Conjugation on subgroups of $A_4$ faithful?

A question about quotient under group action

Show that the orbits of $S_n$ under the conjugation action of $S_n$ on itself correspond 1-1 with the cycle types.

Different actions of an affine primitive group?

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