List questions from orbifolds

Published on 22 Feb 2026 - 21:46

245

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About the definition of orbifolds

Published on 22 Feb 2026 - 23:28

469

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Is every quotient by a finite group an orbifold?

Published on 22 Feb 2026 - 23:28

46

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Orbifold Subchart Definition

Published on 22 Feb 2026 - 23:23

772

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Is the torus an orbifold?

Published on 22 Feb 2026 - 23:24

206

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Is a free and discrete group action on the plane a covering space action?

Published on 22 Feb 2026 - 23:28

545

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Why the teardrop is a bad orbifold?

Published on 22 Feb 2026 - 23:25

56

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Equivalence of Lie groupoids $\phi: H \rightarrow G$ induces an equivalence of categories $\phi^*: G\text{-spaces} \rightarrow H\text{-spaces}$.

Published on 22 Feb 2026 - 21:53

43

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Is a trivial $T^2\times S^1$ bundle with a $\mathbb{Z}_4$ orbifold action the same as a $T^2$ bundle over $S^1$ with a $\mathbb{Z}_4$ twist?

Published on 22 Feb 2026 - 23:29

585

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Reference - Riemannian Orbifolds

Published on 22 Feb 2026 - 23:23

556

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General introduction to orbifolds?

Published on 22 Feb 2026 - 23:25

105

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Quotient of Poincare dodecahedral space-example of spherical orbifold

Published on 23 Feb 2026 - 1:07

169

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Singular locus of orientable 3-orbifolds

Published on 23 Feb 2026 - 1:02

733

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Does Stokes' Theorem hold on spaces with singular points?

Published on 23 Feb 2026 - 1:02

268

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The proof of the quotient space of a manifold with properly discontinuous action is an orbifold.

Published on 23 Feb 2026 - 1:08

List Question

pull back of Groupoid spaces

About the definition of orbifolds

Is every quotient by a finite group an orbifold?

Orbifold Subchart Definition

Is the torus an orbifold?

Is a free and discrete group action on the plane a covering space action?

Why the teardrop is a bad orbifold?

Equivalence of Lie groupoids $\phi: H \rightarrow G$ induces an equivalence of categories $\phi^*: G\text{-spaces} \rightarrow H\text{-spaces}$.

Is a trivial $T^2\times S^1$ bundle with a $\mathbb{Z}_4$ orbifold action the same as a $T^2$ bundle over $S^1$ with a $\mathbb{Z}_4$ twist?

Reference - Riemannian Orbifolds

General introduction to orbifolds?

Quotient of Poincare dodecahedral space-example of spherical orbifold

Singular locus of orientable 3-orbifolds

Does Stokes' Theorem hold on spaces with singular points?

The proof of the quotient space of a manifold with properly discontinuous action is an orbifold.

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