List questions from combinatorial-geometry

49

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Minimal distance between intersections of a regular grid parameterized by its change-of-basis matrix

Published on 13 Jan 2022 - 16:40

103

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Why are there finitely many of these approximations of $\sqrt{2}$?

Published on 27 Mar 2026 - 14:59

80

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What kind of non-optimisation packing problem is this?

Published on 28 Mar 2026 - 6:48

65

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Subsets which overlap in one element

Published on 14 Feb 2022 - 16:30

117

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On a condition of the Szemerédi–Trotter theorem

Published on 16 Feb 2022 - 15:55

270

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existence of $99$ lines in $\mathbb{R}^2$ passing through $100^2$ boxes

Published on 20 Feb 2022 - 19:10

1.6k

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How many 3D shapes can be made from five cubes

Published on 24 Feb 2022 - 0:16

53

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Prove that the number of $k$-simplexes in an $n$-orthoplex is $2^{k+1}\binom{n}{k+1}$ (where $n,k \in \mathbb{N}$ with $0 \leqslant k < n$)?

Published on 29 Mar 2026 - 10:48

102

Views

$4$ red cubes, and $4$ yellow cubes- create a $2\times 2\times 2$ cube

Published on 19 Mar 2022 - 1:38

56

Views

Find area with most points in a 2D plot

Published on 27 Mar 2022 - 18:12

70

Views

Book and study recommendations - discrete geomtry

Published on 29 Mar 2026 - 6:04

76

Views

Explicitly describe the cryptomorphism between greedoids and greedy set operators

Published on 27 Mar 2026 - 3:49

109

Views

Do $4$ balanced points on a sphere form a tetrahedron or lie on a plane?

Published on 17 Apr 2022 - 21:25

111

Views

Trouble with counting the number of closed walks on a $n$-cube

Published on 16 May 2022 - 16:47

180

Views

Rectangles in a rectangle

Published on 28 Mar 2026 - 10:03

List Question

Minimal distance between intersections of a regular grid parameterized by its change-of-basis matrix

Why are there finitely many of these approximations of $\sqrt{2}$?

What kind of non-optimisation packing problem is this?

Subsets which overlap in one element

On a condition of the Szemerédi–Trotter theorem

existence of $99$ lines in $\mathbb{R}^2$ passing through $100^2$ boxes

How many 3D shapes can be made from five cubes

Prove that the number of $k$-simplexes in an $n$-orthoplex is $2^{k+1}\binom{n}{k+1}$ (where $n,k \in \mathbb{N}$ with $0 \leqslant k < n$)?

$4$ red cubes, and $4$ yellow cubes- create a $2\times 2\times 2$ cube

Find area with most points in a 2D plot

Book and study recommendations - discrete geomtry

Explicitly describe the cryptomorphism between greedoids and greedy set operators

Do $4$ balanced points on a sphere form a tetrahedron or lie on a plane?

Trouble with counting the number of closed walks on a $n$-cube

Rectangles in a rectangle

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