List questions from affine-geometry

Published on 27 May 2018 - 11:09

135

Views

Is $X=(x^2-yx, y^2-xz, z^2-x^2y) $ isomorphic to $ \mathbb A_{K}^1$?

Published on 25 Mar 2026 - 1:17

70

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Homotheties involved in a parallelogram

Published on 23 Mar 2026 - 8:17

474

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Masspoints: The method of weights -- Why does it work?

Published on 20 Mar 2026 - 10:55

413

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Convex hull of set of points inside a half-space

Published on 25 Mar 2026 - 9:27

65

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If $A$ is an affine space in $\mathbb{R}^n$, is $A-x$ a subspace of $\mathbb{R}^n$ for every $x \in A$?

Published on 15 Jun 2018 - 14:46

773

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Are non-bijective isometries necessarily affine functions?

Published on 25 Mar 2026 - 4:38

69

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How is this geometrical invariant called in English?

Published on 25 Mar 2026 - 6:12

460

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Jacobian ideal of $f$ and normality

Published on 22 Jun 2018 - 7:27

89

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Showing an affine set is a subset of another affine set

Published on 28 Jun 2018 - 6:34

143

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Isometry of affine space that conserves the area of triangles

Published on 28 Jun 2018 - 10:13

61

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Problem about skew lines

Published on 28 Jun 2018 - 14:47

83

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Affine combination absolute sum?

Published on 29 Jun 2018 - 8:06

72

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How can I show that irreducibility for this set?

Published on 25 Mar 2026 - 4:38

46

Views

Finding the plane that contains all the lines of a given form

Published on 04 Jul 2018 - 15:10

List Question

projection of a vector onto a plane in $\Bbb R^5$

Is $X=(x^2-yx, y^2-xz, z^2-x^2y) $ isomorphic to $ \mathbb A_{K}^1$?

Homotheties involved in a parallelogram

Masspoints: The method of weights -- Why does it work?

Convex hull of set of points inside a half-space

If $A$ is an affine space in $\mathbb{R}^n$, is $A-x$ a subspace of $\mathbb{R}^n$ for every $x \in A$?

Are non-bijective isometries necessarily affine functions?

How is this geometrical invariant called in English?

Jacobian ideal of $f$ and normality

Showing an affine set is a subset of another affine set

Isometry of affine space that conserves the area of triangles

Problem about skew lines

Affine combination absolute sum?

How can I show that irreducibility for this set?

Finding the plane that contains all the lines of a given form

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