Question

Intuitive explanation of perspective vs. projection in geometry

score 114 · Answer 1 · 2026-03-31 01:02:03

114

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Intuitive explanation of perspective vs. projection in geometry

Published on 31 Mar 2026 - 1:02

score 119 · Answer 2 · 2026-03-27 16:02:32

119

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How to prove projective duality?

Published on 27 Mar 2026 - 16:02

score 24 · Answer 3 · 2023-10-22 14:52:01

24

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Questions about configurations in projective geometry?

Published on 22 Oct 2023 - 14:52

score 42 · Answer 4 · 2026-03-25 06:05:28

42

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Maximal set of mutually skew lines in a finite projective space

Published on 25 Mar 2026 - 6:05

score 124 · Answer 5 · 2026-03-30 01:47:06

124

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Checking that a differential form is holomorphic on an algebraic curve and that it extends to a holomorphic form on its compactification

Published on 30 Mar 2026 - 1:47

score 34 · Answer 6 · 2026-03-29 21:54:07

34

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Finding the point of intersection of two lines that lie in the projective space P3

Published on 29 Mar 2026 - 21:54

score 85 · Answer 7 · 2026-03-26 12:52:15

85

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Does there exist a projective CAS calculator?

Published on 26 Mar 2026 - 12:52

score 45 · Answer 8 · 2023-10-30 19:15:22

45

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Deciding if surfaces in $\mathbb{C}P^2$ are varieties

Published on 30 Oct 2023 - 19:15

score 57 · Answer 9 · 2023-10-31 00:53:21

57

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$2$ conics intersect at $2$ real points, geometric construction on $\Bbb R^2$ of the line through 2 non-real points?

Published on 31 Oct 2023 - 0:53

score 32 · Answer 10 · 2026-03-26 06:34:52

32

Views

The Steiner system S(3,6,22) as a one-point extension of the projective plane of order 4

Published on 26 Mar 2026 - 6:34

score 70 · Answer 11 · 2023-11-05 02:16:03

70

Views

Proof Check: Differential of function in projective space.

Published on 05 Nov 2023 - 2:16

score 15 · Answer 12 · 2026-03-05 04:07:40

15

Views

3D curve reconstruction from (mostly) uncorrelated points on multiple 2D projections

Published on 05 Mar 2026 - 4:07

score 219 · Answer 13 · 2026-02-23 06:30:37

219

Views

References for a formula generalizing the "cross ratio = -1" characterization of harmonic division.

Published on 23 Feb 2026 - 6:30

score 76 · Answer 14 · 2026-03-25 20:12:43

76

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Exercise 5.4.1 in Smith's Invitation to Algebraic Geometry; lines that are tangent to conic are closed subvariety of Gr$(2,3)$ in $\mathbb{P}^2$

Published on 25 Mar 2026 - 20:12

score 110 · Answer 15 · 2026-03-27 14:56:48

110

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Formula to project a 3D point onto a sphere, when centre of projection is not necessarily at the centre of the sphere

Published on 27 Mar 2026 - 14:56

List Question

Intuitive explanation of perspective vs. projection in geometry

How to prove projective duality?

Questions about configurations in projective geometry?

Maximal set of mutually skew lines in a finite projective space

Checking that a differential form is holomorphic on an algebraic curve and that it extends to a holomorphic form on its compactification

Finding the point of intersection of two lines that lie in the projective space P3

Does there exist a projective CAS calculator?

Deciding if surfaces in $\mathbb{C}P^2$ are varieties

$2$ conics intersect at $2$ real points, geometric construction on $\Bbb R^2$ of the line through 2 non-real points?

The Steiner system S(3,6,22) as a one-point extension of the projective plane of order 4

Proof Check: Differential of function in projective space.

3D curve reconstruction from (mostly) uncorrelated points on multiple 2D projections

References for a formula generalizing the "cross ratio = -1" characterization of harmonic division.

Exercise 5.4.1 in Smith's Invitation to Algebraic Geometry; lines that are tangent to conic are closed subvariety of Gr$(2,3)$ in $\mathbb{P}^2$

Formula to project a 3D point onto a sphere, when centre of projection is not necessarily at the centre of the sphere

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