Question

Is the ideal $\langle x^2+y^2+z^2-1,3x^2+y^2-z^2-1,x+z\rangle$ radical?

score 87 · Answer 1 · 2026-03-26 22:55:41

87

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Is the ideal $\langle x^2+y^2+z^2-1,3x^2+y^2-z^2-1,x+z\rangle$ radical?

Published on 26 Mar 2026 - 22:55

score 1.4k · Answer 2 · 2017-10-21 04:14:37

1.4k

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Hole in the axioms of Hartshorne's "Foundations of Projective Geometry"?

Published on 21 Oct 2017 - 4:14

score 208 · Answer 3 · 2017-10-22 12:07:06

208

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How do I prove a certain set is or isn't an affine subspace? (Specific sets inside)

Published on 22 Oct 2017 - 12:07

score 240 · Answer 4 · 2017-10-31 14:51:57

240

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Affine transformation read order

Published on 31 Oct 2017 - 14:51

score 24 · Answer 5 · 2017-11-01 01:18:54

24

Views

Affine transformation read order

Published on 01 Nov 2017 - 1:18

score 3.5k · Answer 6 · 2017-11-01 17:38:59

3.5k

Views

Since the Curvature tensor depends on a connection (not metric), is it the relevant quantity to characterize the curvature of Riemannian manifolds?

Published on 01 Nov 2017 - 17:38

score 57 · Answer 7 · 2017-11-04 23:31:56

57

Views

How to determine the number of affine lines in

Published on 04 Nov 2017 - 23:31

score 1.6k · Answer 8 · 2017-11-05 14:17:15

1.6k

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Find an affine transformation for points

Published on 05 Nov 2017 - 14:17

score 1.4k · Answer 9 · 2017-11-05 15:57:07

1.4k

Views

Can we name the 6 degrees of freedom of a 2d affine transform in an intuitive manner?

Published on 05 Nov 2017 - 15:57

score 512 · Answer 10 · 2026-03-27 00:55:05

512

Views

Self-affinity vs. self-similarity

Published on 27 Mar 2026 - 0:55

score 427 · Answer 11 · 2017-11-08 01:44:00

427

Views

If a line and its points are removed from a projective plane, is the resulting structure an affine plane?

Published on 08 Nov 2017 - 1:44

score 980 · Answer 12 · 2017-11-12 19:03:51

980

Views

Affine transformation on a plane

Published on 12 Nov 2017 - 19:03

score 301 · Answer 13 · 2026-02-23 00:49:32

301

Views

Composition of homotheties does not look homothetic

Published on 23 Feb 2026 - 0:49

score 77 · Answer 14 · 2017-11-14 11:36:51

77

Views

Stabiliser of a curve under Affine Transformations?

Published on 14 Nov 2017 - 11:36

score 584 · Answer 15 · 2026-02-23 16:27:37

584

Views

For non-algebraically closed field $k$ and integer $n>1$, there is a polynomial in $n$-variables over $k$ having only one zero in $k^n$

Published on 23 Feb 2026 - 16:27

List Question

Is the ideal $\langle x^2+y^2+z^2-1,3x^2+y^2-z^2-1,x+z\rangle$ radical?

Hole in the axioms of Hartshorne's "Foundations of Projective Geometry"?

How do I prove a certain set is or isn't an affine subspace? (Specific sets inside)

Affine transformation read order

Affine transformation read order

Since the Curvature tensor depends on a connection (not metric), is it the relevant quantity to characterize the curvature of Riemannian manifolds?

How to determine the number of affine lines in

Find an affine transformation for points

Can we name the 6 degrees of freedom of a 2d affine transform in an intuitive manner?

Self-affinity vs. self-similarity

If a line and its points are removed from a projective plane, is the resulting structure an affine plane?

Affine transformation on a plane

Composition of homotheties does not look homothetic

Stabiliser of a curve under Affine Transformations?

For non-algebraically closed field $k$ and integer $n>1$, there is a polynomial in $n$-variables over $k$ having only one zero in $k^n$

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