List questions from affine-geometry

Published on 23 Sep 2018 - 10:00

285

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Projective classification of quadric from affine classification

Published on 25 Sep 2018 - 18:10

58

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How to show that the span of vectors is a plane

Published on 25 Mar 2026 - 6:12

178

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Strictly convex function in two variables, do the points where the function is partially optimized in one variable trace out a straight line?

Published on 20 Mar 2026 - 1:01

706

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The Sphere is not an Affine Space

Published on 09 Oct 2018 - 4:27

1k

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prove that hyperbolic cone is affine set (check my solution)

Published on 09 Oct 2018 - 8:53

293

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Vector Spaces versus Affine Spaces

Published on 11 Oct 2018 - 19:52

92

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Find coordinates of a regular polygon in a plane.

Published on 12 Oct 2018 - 14:54

174

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affine sets in $\mathbb{R}^2$

Published on 13 Oct 2018 - 15:21

248

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Given a norm, show a map is Affine

Published on 25 Mar 2026 - 5:03

498

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Affine arc length

Published on 25 Mar 2026 - 4:44

235

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Affine space endomorphism and fixed point

Published on 29 Oct 2018 - 14:35

103

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How can I prove the eccentricity of a quadratic conic is invariant under bijective affine transformations?

Published on 30 Oct 2018 - 16:45

72

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If $L$ is a closed convex subset of compact convex set $K$, then the restriction map $A(K)\to A(L)$ is surjective

Published on 04 Nov 2018 - 12:58

297

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Help me prove the following difficult statements about parabolas and triangles

Published on 07 Nov 2018 - 23:55

List Question

How to define affine transformation

Projective classification of quadric from affine classification

How to show that the span of vectors is a plane

Strictly convex function in two variables, do the points where the function is partially optimized in one variable trace out a straight line?

The Sphere is not an Affine Space

prove that hyperbolic cone is affine set (check my solution)

Vector Spaces versus Affine Spaces

Find coordinates of a regular polygon in a plane.

affine sets in $\mathbb{R}^2$

Given a norm, show a map is Affine

Affine arc length

Affine space endomorphism and fixed point

How can I prove the eccentricity of a quadratic conic is invariant under bijective affine transformations?

If $L$ is a closed convex subset of compact convex set $K$, then the restriction map $A(K)\to A(L)$ is surjective

Help me prove the following difficult statements about parabolas and triangles

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