Question

Fundamental group of complex curves

score 585 · Answer 1 · 2026-04-09 02:20:54

585

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Fundamental group of complex curves

Published on 09 Apr 2026 - 2:20

score 113 · Answer 2 · 2026-04-08 21:21:41

113

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The Fundamental group of the circle from "Introduction to knot theory", Ralph H. Fox (1)

Published on 08 Apr 2026 - 21:21

score 76 · Answer 3 · 2026-04-13 15:16:12

76

Views

Let $h,h'$ be hermitian metric over vector space $V$, then grassmanian $G_n(V_h)\to G_n(V_{h'})$ is always continuous?

Published on 13 Apr 2026 - 15:16

score 49 · Answer 4 · 2026-04-16 22:31:52

49

Views

$C^m\to C^{m-1}$ projection map projecting out last factor inducing $G_n(C^{m-1})\to G_n(C^m)$?

Published on 16 Apr 2026 - 22:31

score 329 · Answer 5 · 2026-04-08 18:02:31

329

Views

A gluing construction for complex projective space

Published on 08 Apr 2026 - 18:02

score 287 · Answer 6 · 2026-04-17 12:00:08

287

Views

Circle in $\mathbb{S}^3$ not mapping to a point in $\mathbb{S}^2$ under Hopf map

Published on 17 Apr 2026 - 12:00

score 102 · Answer 7 · 2026-04-16 22:47:02

102

Views

Proving that $(0,1)^3$ not homeomorphic to $[0,3)^3$

Published on 16 Apr 2026 - 22:47

score 536 · Answer 8 · 2026-04-13 06:32:12

536

Views

What does it mean to "Glue the boundary circle of a mobius strip to another circle in a 2:1 covering map"

Published on 13 Apr 2026 - 6:32

score 261 · Answer 9 · 2026-04-13 01:35:42

261

Views

Show $S^2 \vee \mathbb{R}^2$ is not homotopy equivalent to $S^2 \vee \mathbb{R}^3$

Published on 13 Apr 2026 - 1:35

score 1.6k · Answer 10 · 2026-04-15 17:22:54

Compute the homology groups $H_n(X, A)$ when $X$ is $\mathbb{S}^2$ or $\mathbb{S}^1\times \mathbb{S}^1$ and $A$ is a finite set of points in $X$.

score 52 · Answer 11 · 2026-04-08 12:20:23

52

Views

The Fundamental group of the circle from "Introduction to knot theory", Ralph H. Fox (3)

Published on 08 Apr 2026 - 12:20

score 243 · Answer 12 · 2026-04-13 01:56:52

243

Views

A triangulation of the torus

Published on 13 Apr 2026 - 1:56

score 1.9k · Answer 13 · 2026-04-15 06:41:13

1.9k

Views

Fundamental group of $S^3$ with finitely many points removed?

Published on 15 Apr 2026 - 6:41

score 77 · Answer 14 · 2026-04-16 11:24:37

77

Views

Determine all abelian $G$ such that $0 \to \mathbb{Z} \to G \to \mathbb{Z_n} \to 0$ is exact - from Massey's A basic course in algebraic topology

Published on 16 Apr 2026 - 11:24

score 214 · Answer 15 · 2026-04-16 19:48:35

214

Views

Classifying space of a functor category

Published on 16 Apr 2026 - 19:48

List Question

Fundamental group of complex curves

The Fundamental group of the circle from "Introduction to knot theory", Ralph H. Fox (1)

Let $h,h'$ be hermitian metric over vector space $V$, then grassmanian $G_n(V_h)\to G_n(V_{h'})$ is always continuous?

$C^m\to C^{m-1}$ projection map projecting out last factor inducing $G_n(C^{m-1})\to G_n(C^m)$?

A gluing construction for complex projective space

Circle in $\mathbb{S}^3$ not mapping to a point in $\mathbb{S}^2$ under Hopf map

Proving that $(0,1)^3$ not homeomorphic to $[0,3)^3$

What does it mean to "Glue the boundary circle of a mobius strip to another circle in a 2:1 covering map"

Show $S^2 \vee \mathbb{R}^2$ is not homotopy equivalent to $S^2 \vee \mathbb{R}^3$

Compute the homology groups $H_n(X, A)$ when $X$ is $\mathbb{S}^2$ or $\mathbb{S}^1\times \mathbb{S}^1$ and $A$ is a finite set of points in $X$.

The Fundamental group of the circle from "Introduction to knot theory", Ralph H. Fox (3)

A triangulation of the torus

Fundamental group of $S^3$ with finitely many points removed?

Determine all abelian $G$ such that $0 \to \mathbb{Z} \to G \to \mathbb{Z_n} \to 0$ is exact - from Massey's A basic course in algebraic topology

Classifying space of a functor category

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