Question

Need a description of the map $i:\mathbb{C}P^2\vee\mathbb{C}P^2\rightarrow \mathbb{C}P^2\times \mathbb{C}P^2$ on $2$nd Cohomology level

score 35 · Answer 1 · 2026-04-14 12:42:33

Need a description of the map $i:\mathbb{C}P^2\vee\mathbb{C}P^2\rightarrow \mathbb{C}P^2\times \mathbb{C}P^2$ on $2$nd Cohomology level

score 58 · Answer 2 · 2026-04-09 06:07:44

58

Views

A compact convex set $A$ is contained in $\mathbb{R}^n$ then for any section $x \rightarrow a_x$ there is a unique $a_A \rightarrow a_x$

Published on 09 Apr 2026 - 6:07

score 119 · Answer 3 · 2026-04-12 00:20:12

119

Views

Non orientable normal bundle gives a non simply connected manifold

Published on 12 Apr 2026 - 0:20

score 263 · Answer 4 · 2026-04-17 02:19:48

263

Views

If $p$ is a regular covering then so is $q$.

Published on 17 Apr 2026 - 2:19

score 197 · Answer 5 · 2026-04-15 00:51:59

197

Views

For every group $G$ there is a semilocally simply-connected cell complex $X$ with $\pi_1(X)=G$

Published on 15 Apr 2026 - 0:51

score 108 · Answer 6 · 2026-04-17 06:34:27

108

Views

Generator of Homology of $n$-ball relative to the $(n-1)$-sphere

Published on 17 Apr 2026 - 6:34

score 507 · Answer 7 · 2026-04-10 22:04:22

507

Views

Homotopy Lifting Problem

Published on 10 Apr 2026 - 22:04

score 116 · Answer 8 · 2026-04-12 17:44:30

116

Views

Understanding theorem 15.12 in Kosniovski's A first course in algebraic topology

Published on 12 Apr 2026 - 17:44

score 71 · Answer 9 · 2026-04-13 16:51:02

71

Views

Express the quotient of $\mathbb{R}^2/\mathbb{Z}^2$ by the relation $(x,y) \equiv (-x,-y)$ as the quotient of a polygon

Published on 13 Apr 2026 - 16:51

score 452 · Answer 10 · 2026-04-08 18:32:38

452

Views

How to show a space is not a covering space?

Published on 08 Apr 2026 - 18:32

score 113 · Answer 11 · 2026-04-12 09:59:34

113

Views

Every map $\mathbb{RP}^4 \to S^3$ induces the zero map on $\pi_4(\mathbb{RP}^4)$

Published on 12 Apr 2026 - 9:59

score 904 · Answer 12 · 2026-04-15 07:02:16

904

Views

A covering space in $\Bbb R^3$ exists iff there is an embedding $M_g$ of the 3-torus which induces a surjection

Published on 15 Apr 2026 - 7:02

score 45 · Answer 13 · 2026-04-15 13:58:37

45

Views

$h_:S_(X\times Y)\to S_(X\times Y)$ a homomorphism of natural chain complexes. If $h_0=Id$, show that $h_$ is homotopic to $Id$

Published on 15 Apr 2026 - 13:58

score 556 · Answer 14 · 2026-04-10 15:44:50

556

Views

Visualizing a covering space of a torus

Published on 10 Apr 2026 - 15:44

score 68 · Answer 15 · 2026-04-16 18:52:35

68

Views

Equivalence of cross product?

Published on 16 Apr 2026 - 18:52

List Question

Need a description of the map $i:\mathbb{C}P^2\vee\mathbb{C}P^2\rightarrow \mathbb{C}P^2\times \mathbb{C}P^2$ on $2$nd Cohomology level

A compact convex set $A$ is contained in $\mathbb{R}^n$ then for any section $x \rightarrow a_x$ there is a unique $a_A \rightarrow a_x$

Non orientable normal bundle gives a non simply connected manifold

If $p$ is a regular covering then so is $q$.

For every group $G$ there is a semilocally simply-connected cell complex $X$ with $\pi_1(X)=G$

Generator of Homology of $n$-ball relative to the $(n-1)$-sphere

Homotopy Lifting Problem

Understanding theorem 15.12 in Kosniovski's A first course in algebraic topology

Express the quotient of $\mathbb{R}^2/\mathbb{Z}^2$ by the relation $(x,y) \equiv (-x,-y)$ as the quotient of a polygon

How to show a space is not a covering space?

Every map $\mathbb{RP}^4 \to S^3$ induces the zero map on $\pi_4(\mathbb{RP}^4)$

A covering space in $\Bbb R^3$ exists iff there is an embedding $M_g$ of the 3-torus which induces a surjection

$h_:S_(X\times Y)\to S_(X\times Y)$ a homomorphism of natural chain complexes. If $h_0=Id$, show that $h_$ is homotopic to $Id$

Visualizing a covering space of a torus

Equivalence of cross product?

Trending Questions

Popular # Hahtags

Popular Questions