List questions from combinatorial-geometry

Published on 28 Nov 2017 - 1:39

89

Views

Do the 240 roots of E8 implicitly define five disjoint copies of F4 (with 48 roots each)?

Published on 27 Mar 2026 - 3:44

76

Views

Different balls of the lattice $\mathbf{Z}^d.$

Published on 30 Nov 2017 - 21:06

53

Views

Are the roots of E6 in 9-space ever treated as an orthogonal projection of a set of points in 11-space?

Published on 27 Mar 2026 - 10:12

44

Views

Cases of quasi-coincident "almost orthogonal" projections of n-dimenstional polytopes in (n-k)-spaces

Published on 01 Dec 2017 - 14:04

1.4k

Views

Prove that the shortest side of one triangle is the longest side of another, given 3 pairs of points.

Published on 27 Mar 2026 - 23:14

1.3k

Views

How many ways are there to traverse a 3 by 3 grid such that you start at (0,0) and end at (2,2)?

Published on 12 Dec 2017 - 21:41

1.1k

Views

Venn diagram with rectangles for $n > 3$

Published on 28 Mar 2026 - 4:23

452

Views

$0$ interior to the convex hull of rational vectors

Published on 27 Mar 2026 - 2:02

153

Views

Defining the "Level of Convexity" for Non-Convex Bodies

Published on 21 Dec 2017 - 12:27

145

Views

How can I count the number of square on this sphere?

Published on 21 Dec 2017 - 15:49

899

Views

Venn diagram with rectangles: How many among $\binom{n}{k}$ regions created by intersections of exactly $k$ rectangles can be represented?

Published on 28 Mar 2026 - 4:28

140

Views

What is the connection between these quantities?

Published on 29 Dec 2017 - 4:36

261

Views

Largest number of sides and diagonals

Published on 01 Jan 2018 - 13:47

1k

Views

Counting triangles in a big triangle

Published on 04 Jan 2018 - 13:14

List Question

Does anyone know of any specific "eutactic hyperstars"?

Do the 240 roots of E8 implicitly define five disjoint copies of F4 (with 48 roots each)?

Different balls of the lattice $\mathbf{Z}^d.$

Are the roots of E6 in 9-space ever treated as an orthogonal projection of a set of points in 11-space?

Cases of quasi-coincident "almost orthogonal" projections of n-dimenstional polytopes in (n-k)-spaces

Prove that the shortest side of one triangle is the longest side of another, given 3 pairs of points.

How many ways are there to traverse a 3 by 3 grid such that you start at (0,0) and end at (2,2)?

Venn diagram with rectangles for $n > 3$

$0$ interior to the convex hull of rational vectors

Defining the "Level of Convexity" for Non-Convex Bodies

How can I count the number of square on this sphere?

Venn diagram with rectangles: How many among $\binom{n}{k}$ regions created by intersections of exactly $k$ rectangles can be represented?

What is the connection between these quantities?

Largest number of sides and diagonals

Counting triangles in a big triangle

Trending Questions

Popular # Hahtags

Popular Questions