List questions from manifolds-with-boundary

Published on 13 Mar 2026 - 22:10

1k

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Is the complex projective plane a compact manifold with or without boundary (closed manifold)?

Published on 14 Mar 2026 - 2:28

416

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Boundary points of a manifold

Published on 14 Mar 2026 - 13:48

67

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Show that $((0,1)\times(0,1))\cup(\{1\}\times[0,1])$ is not a smooth manifold with boundary$

Published on 17 Oct 2019 - 11:48

63

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Does there exist an inclusion map making a given boundary point into an interior point?

Published on 19 Oct 2019 - 18:38

45

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How to define bounds in a projected space from which we want to also recover

Published on 04 Nov 2019 - 9:20

133

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Compact boundary of non compact manifold

Published on 15 Nov 2019 - 16:07

181

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Atlas for closed interval as manifold-with-boundary

Published on 27 Nov 2019 - 16:30

104

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Is the domain of the maximal integral curve of $N|_{\operatorname{Int}M} $ starting at $f_p(a)$ an open interval of the form $(-a,b)$?

Published on 28 Nov 2019 - 11:21

181

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domain of flow of an inner vector field is a manifold with corners

Published on 01 Dec 2019 - 9:22

166

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Removing the boundary from a manifold-with-boundary while preserving non-negativity of scalar curvature & completeness

Published on 02 Dec 2019 - 12:26

316

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Atlas for the closed ball.

Published on 16 Dec 2019 - 10:04

44

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1-manifold with boundary

Published on 25 Dec 2019 - 11:18

98

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Which kind of regularity of a 2-dimensional manifold do we need to assume such that there is a surface measure and outer normal field on it?

Published on 25 Dec 2019 - 17:15

411

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Collar neighborhoods of a topological manifold with boundary

Published on 25 Mar 2026 - 16:03

List Question

Gauss-Green Theorem from generalized Stoke's Theorem.

Is the complex projective plane a compact manifold with or without boundary (closed manifold)?

Boundary points of a manifold

Show that $((0,1)\times(0,1))\cup(\{1\}\times[0,1])$ is not a smooth manifold with boundary$

Does there exist an inclusion map making a given boundary point into an interior point?

How to define bounds in a projected space from which we want to also recover

Compact boundary of non compact manifold

Atlas for closed interval as manifold-with-boundary

Is the domain of the maximal integral curve of $N|_{\operatorname{Int}M} $ starting at $f_p(a)$ an open interval of the form $(-a,b)$?

domain of flow of an inner vector field is a manifold with corners

Removing the boundary from a manifold-with-boundary while preserving non-negativity of scalar curvature & completeness

Atlas for the closed ball.

1-manifold with boundary

Which kind of regularity of a 2-dimensional manifold do we need to assume such that there is a surface measure and outer normal field on it?

Collar neighborhoods of a topological manifold with boundary

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