Question

Lefschetz hyperplane is as good as it gets: failure of injectivity of pullback in all degrees

score 33 · Answer 1 · 2023-12-17 15:17:49

33

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Lefschetz hyperplane is as good as it gets: failure of injectivity of pullback in all degrees

Published on 17 Dec 2023 - 15:17

score 54 · Answer 2 · 2023-12-18 12:09:50

54

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Which ideals on $S \otimes_R T$ correspond to closed subschemes $Proj(S) \times_{Spec(R)} Proj(T)$?

Published on 18 Dec 2023 - 12:09

score 74 · Answer 3 · 2023-12-20 12:23:20

74

Views

Constructing the reflected pyramid from a given perspective image

Published on 20 Dec 2023 - 12:23

score 131 · Answer 4 · 2023-12-21 07:24:48

131

Views

Determining the dimensions of a cuboid from a perspective image with known camera position and orientation

Published on 21 Dec 2023 - 7:24

score 92 · Answer 5 · 2026-02-23 06:21:56

92

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Does the Power of a Point Theorem apply to a point at infinity?

Published on 23 Feb 2026 - 6:21

score 50 · Answer 6 · 2026-03-30 01:28:15

50

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Question about the fixed point set of projective involution on $\mathbb{RP}^2$

Published on 30 Mar 2026 - 1:28

score 36 · Answer 7 · 2026-03-30 03:20:20

36

Views

Definition of extended euclidean space

Published on 30 Mar 2026 - 3:20

score 27 · Answer 8 · 2026-03-26 07:39:07

27

Views

Homogenizing rational function in projective field to find poles gives different poles depending on which $X_i$ is used for homogenizing

Published on 26 Mar 2026 - 7:39

score 56 · Answer 9 · 2026-03-25 19:00:29

56

Views

Some properties in Projective Geometry

Published on 25 Mar 2026 - 19:00

score 47 · Answer 10 · 2026-03-25 20:35:40

47

Views

When are projective, affine geometries uniform matroids?

Published on 25 Mar 2026 - 20:35

score 29 · Answer 11 · 2024-01-04 04:00:00

29

Views

Is the image of the Veronese mapping ever contained in a proper linear subspace of $\mathbb{P}^n$ regardless of the field?

Published on 04 Jan 2024 - 4:00

score 43 · Answer 12 · 2026-03-26 01:07:28

43

Views

Understanding contraction in hyperplane arrangements.

Published on 26 Mar 2026 - 1:07

score 22 · Answer 13 · 2026-03-26 01:01:08

22

Views

Characteristic polynomial and bounded regions.

Published on 26 Mar 2026 - 1:01

score 54 · Answer 14 · 2024-01-06 17:33:33

54

Views

Why does a projective transformation require an invertible linear transformation?

Published on 06 Jan 2024 - 17:33

score 36 · Answer 15 · 2024-01-06 18:03:40

36

Views

From vector to projective spaces

Published on 06 Jan 2024 - 18:03

List Question

Lefschetz hyperplane is as good as it gets: failure of injectivity of pullback in all degrees

Which ideals on $S \otimes_R T$ correspond to closed subschemes $Proj(S) \times_{Spec(R)} Proj(T)$?

Constructing the reflected pyramid from a given perspective image

Determining the dimensions of a cuboid from a perspective image with known camera position and orientation

Does the Power of a Point Theorem apply to a point at infinity?

Question about the fixed point set of projective involution on $\mathbb{RP}^2$

Definition of extended euclidean space

Homogenizing rational function in projective field to find poles gives different poles depending on which $X_i$ is used for homogenizing

Some properties in Projective Geometry

When are projective, affine geometries uniform matroids?

Is the image of the Veronese mapping ever contained in a proper linear subspace of $\mathbb{P}^n$ regardless of the field?

Understanding contraction in hyperplane arrangements.

Characteristic polynomial and bounded regions.

Why does a projective transformation require an invertible linear transformation?

From vector to projective spaces

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