Question

About the $PG(3,2)$ square representation

score 46 · Answer 1 · 2020-09-15 08:20:57

46

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About the $PG(3,2)$ square representation

Published on 15 Sep 2020 - 8:20

score 134 · Answer 2 · 2020-09-16 20:28:06

134

Views

Embedding Euclidean Space Into Real Projective Space

Published on 16 Sep 2020 - 20:28

score 37 · Answer 3 · 2020-09-17 16:52:53

37

Views

Showing that a manifold is homeomorphic to $S^1$ or $S^1 \sqcup S^1$.

Published on 17 Sep 2020 - 16:52

score 230 · Answer 4 · 2020-09-18 05:55:11

230

Views

Why is $0$ excluded from the definition of the projective space?

Published on 18 Sep 2020 - 5:55

score 116 · Answer 5 · 2026-03-28 17:42:02

116

Views

Pushforward of hyperplane class of hyperplane section in Chow ring

Published on 28 Mar 2026 - 17:42

score 73 · Answer 6 · 2020-09-25 16:04:35

73

Views

Use of homogeneous coordinates to intersect lines

Published on 25 Sep 2020 - 16:04

score 24 · Answer 7 · 2020-09-28 13:17:47

24

Views

How to understand the quotient of $K(\mathbb{P}^1_{x_0,x_1})$ by a local ring of some point

Published on 28 Sep 2020 - 13:17

score 26 · Answer 8 · 2020-09-28 23:15:13

26

Views

Union of lines that passes through some point of a closed set is closed in $R^n\setminus\{0\}$

Published on 28 Sep 2020 - 23:15

score 71 · Answer 9 · 2026-03-25 17:41:51

71

Views

If $I\subset S$ is the homogeneous ideal of a finite set of points in $\mathbb P^n$, then $\dim S/I=1$.

Published on 25 Mar 2026 - 17:41

score 45 · Answer 10 · 2020-09-30 09:05:26

45

Views

In which case three projetive points exist on the same projetive line $RP^2$.

Published on 30 Sep 2020 - 9:05

score 526 · Answer 11 · 2020-10-04 08:50:07

526

Views

Smooth surjective submersion from $\mathbb C^2\setminus \{0\}$ to $\mathbb S^2$

Published on 04 Oct 2020 - 8:50

score 54 · Answer 12 · 2026-03-28 05:01:06

54

Views

Equivalent definitions Stiefel - Whitney / Chern - classes

Published on 28 Mar 2026 - 5:01

score 44 · Answer 13 · 2020-10-13 02:17:05

44

Views

A linear isomorphism $T:\mathbb{R}^{n+1} \to \mathbb{R}^{n+1}$ induces a smooth map $\tilde{T}:\mathbb{RP}^n \to \mathbb{RP}^n$.

Published on 13 Oct 2020 - 2:17

score 215 · Answer 14 · 2020-10-18 09:19:06

215

Views

Collection of lines through $P$ in projective space

Published on 18 Oct 2020 - 9:19

score 123 · Answer 15 · 2026-03-29 03:22:28

123

Views

The set of lines through a fixed point in $\mathbb{P}^3$

Published on 29 Mar 2026 - 3:22

List Question

About the $PG(3,2)$ square representation

Embedding Euclidean Space Into Real Projective Space

Showing that a manifold is homeomorphic to $S^1$ or $S^1 \sqcup S^1$.

Why is $0$ excluded from the definition of the projective space?

Pushforward of hyperplane class of hyperplane section in Chow ring

Use of homogeneous coordinates to intersect lines

How to understand the quotient of $K(\mathbb{P}^1_{x_0,x_1})$ by a local ring of some point

Union of lines that passes through some point of a closed set is closed in $R^n\setminus\{0\}$

If $I\subset S$ is the homogeneous ideal of a finite set of points in $\mathbb P^n$, then $\dim S/I=1$.

In which case three projetive points exist on the same projetive line $RP^2$.

Smooth surjective submersion from $\mathbb C^2\setminus \{0\}$ to $\mathbb S^2$

Equivalent definitions Stiefel - Whitney / Chern - classes

A linear isomorphism $T:\mathbb{R}^{n+1} \to \mathbb{R}^{n+1}$ induces a smooth map $\tilde{T}:\mathbb{RP}^n \to \mathbb{RP}^n$.

Collection of lines through $P$ in projective space

The set of lines through a fixed point in $\mathbb{P}^3$

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