List questions from projective-geometry

Published on 27 Mar 2026 - 1:44

206

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Prove that a collineation has an axis if having a centre

Published on 27 Mar 2026 - 0:02

47

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Prove $\{x\in\mathbb{R}^3: 0=(a_1\times x+a_2)\times(b_1 \times x+b_2)\}$ is finite union of affine spaces

Published on 26 Mar 2026 - 4:23

164

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Determine 4th vertex of a square in a perspective projection given 3 other vertices

Published on 27 Sep 2019 - 17:57

650

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Doubts on the proof about the classification of irreducible projective conics

Published on 27 Mar 2026 - 0:04

246

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Understanding degrees of freedom of a twisted cubic

Published on 26 Mar 2026 - 15:37

40

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$L_d = (\mathbb{C}^{n+1} - \{0\}) \times \mathbb{C}/\sim,$ where $(x_0, \dots, x_n, q) \sim (\lambda x_0, \dots \lambda x_n, \lambda^dq).$

Published on 27 Mar 2026 - 0:10

142

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Projecting a stretched grid to the unit disk?

Published on 26 Mar 2026 - 6:33

889

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Projection of a rectangle onto a sphere

Published on 01 Oct 2019 - 23:13

10.8k

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Finding distance from point to line determined by vector

Published on 11 Mar 2014 - 20:21

10.9k

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Relative camera matrix (pose) from global camera matrixes

Published on 25 Mar 2026 - 11:09

45

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What does the closure of a set mean?

Published on 23 Mar 2014 - 19:12

1.2k

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Tesseract projection into $3D$

Published on 27 Mar 2026 - 23:57

512

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Tangent lines of conics

Published on 29 Mar 2014 - 14:35

865

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Projection from a point to a plane - confused about terminology.

Published on 29 Mar 2014 - 17:00

List Question

On an application of Bézout's theorem

Prove that a collineation has an axis if having a centre

Prove $\{x\in\mathbb{R}^3: 0=(a_1\times x+a_2)\times(b_1 \times x+b_2)\}$ is finite union of affine spaces

Determine 4th vertex of a square in a perspective projection given 3 other vertices

Doubts on the proof about the classification of irreducible projective conics

Understanding degrees of freedom of a twisted cubic

$L_d = (\mathbb{C}^{n+1} - \{0\}) \times \mathbb{C}/\sim,$ where $(x_0, \dots, x_n, q) \sim (\lambda x_0, \dots \lambda x_n, \lambda^dq).$

Projecting a stretched grid to the unit disk?

Projection of a rectangle onto a sphere

Finding distance from point to line determined by vector

Relative camera matrix (pose) from global camera matrixes

What does the closure of a set mean?

Tesseract projection into $3D$

Tangent lines of conics

Projection from a point to a plane - confused about terminology.

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