List questions from group-actions

Published on 10 Jan 2017 - 4:46

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Is this continuous bijection a homeomorphism?

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294

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Homology of a the Orbit Space of a "Nice" Action of a Group on a CW-Complex

Published on 26 Mar 2026 - 12:37

146

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Faithful Action of N $\rtimes$ G on N

Published on 29 Mar 2026 - 3:28

696

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Orbits of Special Linear Group acting on $\mathbb{C}^n$

Published on 25 Mar 2026 - 17:38

144

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Equivalence of definitions of torsors in categories

Published on 17 Jan 2017 - 13:32

189

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Hyperbolic polygons as fundamental regions for groups $\Gamma\subset \text{Iso}(\mathbb{H}^2)$

Published on 27 Mar 2026 - 2:59

380

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Showing that the stabilizer of a given element is cyclic

Published on 17 Jan 2017 - 19:02

93

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Definition of Lie algebra representations on linear maps

Published on 18 Jan 2017 - 19:52

228

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Quotient map $\pi: M\rightarrow M/G$ is a local isometry iff...

Published on 27 Mar 2026 - 2:59

260

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What are the $\mathbb{R}$-vector subspaces invariant under this action?

Published on 26 Mar 2026 - 6:09

4.6k

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Definition of stabilizer of a set

Published on 23 Jan 2017 - 2:54

75

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Continuity of translation function in fibers

Published on 25 Mar 2026 - 22:03

199

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Is this an action?

Published on 30 Jan 2017 - 1:27

63

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Understanding group orders

Published on 31 Jan 2017 - 18:40

List Question

A real subspace of a complex space

Is this continuous bijection a homeomorphism?

Homology of a the Orbit Space of a "Nice" Action of a Group on a CW-Complex

Faithful Action of N $\rtimes$ G on N

Orbits of Special Linear Group acting on $\mathbb{C}^n$

Equivalence of definitions of torsors in categories

Hyperbolic polygons as fundamental regions for groups $\Gamma\subset \text{Iso}(\mathbb{H}^2)$

Showing that the stabilizer of a given element is cyclic

Definition of Lie algebra representations on linear maps

Quotient map $\pi: M\rightarrow M/G$ is a local isometry iff...

What are the $\mathbb{R}$-vector subspaces invariant under this action?

Definition of stabilizer of a set

Continuity of translation function in fibers

Is this an action?

Understanding group orders

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