Question

Self-homeomorphism of $\Bbb R^2\backslash\text{interior of four non-intersecting circles}$

score 85 · Answer 1 · 2026-04-13 23:40:55

85

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Self-homeomorphism of $\Bbb R^2\backslash\text{interior of four non-intersecting circles}$

Published on 13 Apr 2026 - 23:40

score 368 · Answer 2 · 2026-04-15 04:51:41

368

Views

Guillemin&Pollack - Showing that the normal bundle is a manifold

Published on 15 Apr 2026 - 4:51

score 324 · Answer 3 · 2026-04-11 22:12:10

324

Views

diffeomorphism $(TS^n) \times \mathbb{R} \approx S^n \times \mathbb{R}^{n+1}$

Published on 11 Apr 2026 - 22:12

score 315 · Answer 4 · 2026-04-12 00:02:01

315

Views

Interpretation and generalization of pullback and pushforward

Published on 12 Apr 2026 - 0:02

score 384 · Answer 5 · 2026-04-14 04:55:37

384

Views

Genericity of embeddings of closed manifolds

Published on 14 Apr 2026 - 4:55

score 944 · Answer 6 · 2026-04-14 03:14:59

944

Views

Loch Ness monster and Jacob's Ladder Surfaces are NOT homeomorphic

Published on 14 Apr 2026 - 3:14

score 856 · Answer 7 · 2026-04-13 03:23:43

856

Views

What are the known examples of closed, connected and simply connected manifolds of positive Euler characteristic?

Published on 13 Apr 2026 - 3:23

score 71 · Answer 8 · 2026-04-16 08:16:54

71

Views

Smooth extension and derivative with respect to $t$ of a function $y_t$ on a variable domain $\Omega_t$

Published on 16 Apr 2026 - 8:16

score 429 · Answer 9 · 2026-04-09 12:03:53

429

Views

Definition of Poincare Duality: Integral descend to cohomology

Published on 09 Apr 2026 - 12:03

score 277 · Answer 10 · 2026-04-13 05:33:11

277

Views

Convergence of sequences in the strong Whitney topology

Published on 13 Apr 2026 - 5:33

score 144 · Answer 11 · 2026-04-16 12:42:27

144

Views

Do have all closed, oriented manifolds a vector fields with infinitely many isolated singularities?

Published on 16 Apr 2026 - 12:42

score 47 · Answer 12 · 2026-04-15 23:38:49

47

Views

Is the topological interior of a $k$-dimensional submanifold of $\mathbb R^d$ with boundary empty unless $k=d$?

Published on 15 Apr 2026 - 23:38

score 27 · Answer 13 · 2026-04-12 05:17:35

27

Views

If a function has a local $C^1$-extension, is it locally continuous?

Published on 12 Apr 2026 - 5:17

score 650 · Answer 14 · 2026-04-11 06:08:04

650

Views

How to prove that the solution of a differential equation is bounded?

Published on 11 Apr 2026 - 6:08

score 276 · Answer 15 · 2026-05-11 02:04:45

276

Views

Dimension of $r$-jets of maps from manifolds $M$ to $N$

Published on 11 May 2026 - 2:04

List Question

Self-homeomorphism of $\Bbb R^2\backslash\text{interior of four non-intersecting circles}$

Guillemin&Pollack - Showing that the normal bundle is a manifold

diffeomorphism $(TS^n) \times \mathbb{R} \approx S^n \times \mathbb{R}^{n+1}$

Interpretation and generalization of pullback and pushforward

Genericity of embeddings of closed manifolds

Loch Ness monster and Jacob's Ladder Surfaces are NOT homeomorphic

What are the known examples of closed, connected and simply connected manifolds of positive Euler characteristic?

Smooth extension and derivative with respect to $t$ of a function $y_t$ on a variable domain $\Omega_t$

Definition of Poincare Duality: Integral descend to cohomology

Convergence of sequences in the strong Whitney topology

Do have all closed, oriented manifolds a vector fields with infinitely many isolated singularities?

Is the topological interior of a $k$-dimensional submanifold of $\mathbb R^d$ with boundary empty unless $k=d$?

If a function has a local $C^1$-extension, is it locally continuous?

How to prove that the solution of a differential equation is bounded?

Dimension of $r$-jets of maps from manifolds $M$ to $N$

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