Question

What is the plane at infinity

score 91 · Answer 1 · 2026-03-27 19:30:31

91

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What is the plane at infinity

Published on 27 Mar 2026 - 19:30

score 69 · Answer 2 · 2026-03-26 01:03:29

69

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All the open affine subsets of $\mathbb{A}^1 \subseteq \mathbb{P}^1$. Are open affine subsets always Zariski open?

Published on 26 Mar 2026 - 1:03

score 117 · Answer 3 · 2026-03-22 06:06:50

117

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Why are all real inflection points on a cubic projective algebraic curve on 1 line?

Published on 22 Mar 2026 - 6:06

score 97 · Answer 4 · 2026-03-26 04:34:15

97

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Image of a projective variety is a projective variety

Published on 26 Mar 2026 - 4:34

score 37 · Answer 5 · 2026-03-25 18:59:54

37

Views

Constructing projective geometries

Published on 25 Mar 2026 - 18:59

score 193 · Answer 6 · 2023-11-19 19:35:25

193

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What is a definition of a projective line?

Published on 19 Nov 2023 - 19:35

score 158 · Answer 7 · 2026-03-28 14:06:34

158

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Why can the area projected onto a plane be calculated with the dot product of the vector area and the unit vector of the plane?

Published on 28 Mar 2026 - 14:06

score 58 · Answer 8 · 2026-03-26 17:30:25

58

Views

Get 3d ray in world coordinates from a 2d pixel location

Published on 26 Mar 2026 - 17:30

score 63 · Answer 9 · 2026-02-23 02:40:45

63

Views

Geometric proof of $|\frac{e^{j\theta} - a}{1 - ae^{j\theta}}| = 1$

Published on 23 Feb 2026 - 2:40

score 21 · Answer 10 · 2023-12-01 17:30:29

21

Views

When is the image of an algebraic map into $\mathbb{CP}^n$ is a complex projecitve submanifold.

Published on 01 Dec 2023 - 17:30

score 79 · Answer 11 · 2023-12-03 16:28:39

79

Views

How to define sections on the Fermat quintic hypersurface?

Published on 03 Dec 2023 - 16:28

score 89 · Answer 12 · 2026-03-25 19:05:29

89

Views

Definition and computation of concrete blow-up on projective plane

Published on 25 Mar 2026 - 19:05

score 111 · Answer 13 · 2026-03-30 01:27:07

111

Views

Projective transformation on homogeneous polynomials

Published on 30 Mar 2026 - 1:27

score 106 · Answer 14 · 2023-12-11 13:33:09

106

Views

Given collinear points $A$, $B$, $C$, a variable line through $C$ meets a conic at $P$ and $Q$. Why does $AP\cap BQ$ trace another conic?

Published on 11 Dec 2023 - 13:33

score 88 · Answer 15 · 2026-03-28 15:36:52

88

Views

How do I project a point $P$ onto a sphere from a projective point $C$ that is NOT located at the sphere's center or surface?

Published on 28 Mar 2026 - 15:36

List Question

What is the plane at infinity

All the open affine subsets of $\mathbb{A}^1 \subseteq \mathbb{P}^1$. Are open affine subsets always Zariski open?

Why are all real inflection points on a cubic projective algebraic curve on 1 line?

Image of a projective variety is a projective variety

Constructing projective geometries

What is a definition of a projective line?

Why can the area projected onto a plane be calculated with the dot product of the vector area and the unit vector of the plane?

Get 3d ray in world coordinates from a 2d pixel location

Geometric proof of $|\frac{e^{j\theta} - a}{1 - ae^{j\theta}}| = 1$

When is the image of an algebraic map into $\mathbb{CP}^n$ is a complex projecitve submanifold.

How to define sections on the Fermat quintic hypersurface?

Definition and computation of concrete blow-up on projective plane

Projective transformation on homogeneous polynomials

Given collinear points $A$, $B$, $C$, a variable line through $C$ meets a conic at $P$ and $Q$. Why does $AP\cap BQ$ trace another conic?

How do I project a point $P$ onto a sphere from a projective point $C$ that is NOT located at the sphere's center or surface?

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