Question

Reference for a theorem about necessary and sufficient conditions for configuration of n-tuples of points.

score 94 · Answer 1 · 2026-04-02 07:03:41

94

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Reference for a theorem about necessary and sufficient conditions for configuration of n-tuples of points.

Published on 02 Apr 2026 - 7:03

score 119 · Answer 2 · 2021-04-18 23:45:55

119

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How do I derive this matrix expression?

Published on 18 Apr 2021 - 23:45

score 123 · Answer 3 · 2021-04-25 01:16:47

123

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Computing projective closure of $\mathcal Z(y-x^2) \subset \mathbb A^2$ in $\mathbb P^2$.

Published on 25 Apr 2021 - 1:16

score 146 · Answer 4 · 2021-04-25 16:51:34

146

Views

Understanding the projective algebraic set $\mathcal Z(xz-y^2) \subset \mathbb P^2$. Is $\mathcal Z(xz-y^2) = \mathcal Z(y^2-z) \cup \mathcal Z(x,y)$?

Published on 25 Apr 2021 - 16:51

score 123 · Answer 5 · 2021-04-26 16:28:32

123

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Isomorphism between groups, groups of conics

Published on 26 Apr 2021 - 16:28

score 56 · Answer 6 · 2021-04-26 19:40:57

56

Views

Stability of $\operatorname{Sym} T^2$ on $\mathbb{P}^2$

Published on 26 Apr 2021 - 19:40

score 197 · Answer 7 · 2026-03-29 07:21:11

197

Views

Find projective transformation

Published on 29 Mar 2026 - 7:21

score 106 · Answer 8 · 2026-04-02 17:03:08

106

Views

Computing degree of a map

Published on 02 Apr 2026 - 17:03

score 185 · Answer 9 · 2021-05-04 19:42:24

185

Views

Two points in projective space: $(\mathbf{P}^2)^{[2]} \simeq \text{Bl}_\Delta (\mathbf{P}^2 \times \mathbf{P}^2)/S_2$

Published on 04 May 2021 - 19:42

score 164 · Answer 10 · 2026-04-01 20:02:15

164

Views

For which points $P$ on a nonsingular cubic $C$ does there exist a nonsingular conic that intersects $C$ only at $P$?

Published on 01 Apr 2026 - 20:02

score 66 · Answer 11 · 2026-03-26 23:10:54

66

Views

Determine if we're looking at a video of a photo rather than the actual thing

Published on 26 Mar 2026 - 23:10

score 45 · Answer 12 · 2026-04-02 17:06:56

45

Views

Example of two conics intersecting in projective space in exactly 3 points

Published on 02 Apr 2026 - 17:06

score 972 · Answer 13 · 2021-05-08 06:29:53

972

Views

What's the difference between homogeneous coordinates and projected coordinates?

Published on 08 May 2021 - 6:29

score 44 · Answer 14 · 2021-05-08 17:21:37

44

Views

Cubic and Conic curves has an linear factor in common?

Published on 08 May 2021 - 17:21

score 306 · Answer 15 · 2021-05-09 08:10:57

306

Views

Find the length of the segment $QA$ in acute-angled $\triangle ABC$

Published on 09 May 2021 - 8:10

List Question

Reference for a theorem about necessary and sufficient conditions for configuration of n-tuples of points.

How do I derive this matrix expression?

Computing projective closure of $\mathcal Z(y-x^2) \subset \mathbb A^2$ in $\mathbb P^2$.

Understanding the projective algebraic set $\mathcal Z(xz-y^2) \subset \mathbb P^2$. Is $\mathcal Z(xz-y^2) = \mathcal Z(y^2-z) \cup \mathcal Z(x,y)$?

Isomorphism between groups, groups of conics

Stability of $\operatorname{Sym} T^2$ on $\mathbb{P}^2$

Find projective transformation

Computing degree of a map

Two points in projective space: $(\mathbf{P}^2)^{[2]} \simeq \text{Bl}_\Delta (\mathbf{P}^2 \times \mathbf{P}^2)/S_2$

For which points $P$ on a nonsingular cubic $C$ does there exist a nonsingular conic that intersects $C$ only at $P$?

Determine if we're looking at a video of a photo rather than the actual thing

Example of two conics intersecting in projective space in exactly 3 points

What's the difference between homogeneous coordinates and projected coordinates?

Cubic and Conic curves has an linear factor in common?

Find the length of the segment $QA$ in acute-angled $\triangle ABC$

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