Question

Convex hull of finite set in $\mathbb{R^2}$ is a polygon

score 690 · Answer 1 · 2026-03-27 03:59:13

690

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Convex hull of finite set in $\mathbb{R^2}$ is a polygon

Published on 27 Mar 2026 - 3:59

score 125 · Answer 2 · 2020-09-09 11:05:43

125

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Two mathematician try to cover a convex polygon with some convex regions.

Published on 09 Sep 2020 - 11:05

score 36 · Answer 3 · 2026-03-28 20:10:28

36

Views

A question about the facets of convex polytopes and their intersections

Published on 28 Mar 2026 - 20:10

score 157 · Answer 4 · 2026-03-25 16:21:19

157

Views

Insight on difference between Euler characteristics of 2 manifolds: $\chi(U)-\chi(V)$?

Published on 25 Mar 2026 - 16:21

score 15 · Answer 5 · 2026-03-04 08:42:15

15

Views

If a point lies in an affine hull of a convex polytope, outside this polytope, then not all facets are visible from it

Published on 04 Mar 2026 - 8:42

score 236 · Answer 6 · 2026-03-25 18:49:52

236

Views

Maximum number of edges on a uniform hypergraph

Published on 25 Mar 2026 - 18:49

score 62 · Answer 7 · 2020-09-19 22:42:19

62

Views

Comparing volumes of $d$-dimensional unit-balls to upper bound kissing-number.

Published on 19 Sep 2020 - 22:42

score 486 · Answer 8 · 2020-09-26 19:35:25

486

Views

Which convex shapes are the hardest to bind together with a rubber band?

Published on 26 Sep 2020 - 19:35

score 42 · Answer 9 · 2020-10-02 16:51:41

42

Views

Existence of a finite subset of the unit sphere with a particular orthogonality property

Published on 02 Oct 2020 - 16:51

score 137 · Answer 10 · 2026-02-23 08:59:16

137

Views

Number of independant paths between a discrete set of points?

Published on 23 Feb 2026 - 8:59

score 257 · Answer 11 · 2020-10-06 17:34:02

257

Views

Sets of vertices distances

Published on 06 Oct 2020 - 17:34

score 469 · Answer 12 · 2026-03-27 23:35:53

469

Views

"Perfect" solutions to the kissing number problem besides in dimensions 1,2,8, and 24.

Published on 27 Mar 2026 - 23:35

score 354 · Answer 13 · 2026-03-25 14:29:21

354

Views

Bijective projection from a unit disk to a unit sphere

Published on 25 Mar 2026 - 14:29

score 138 · Answer 14 · 2020-10-21 23:51:26

138

Views

Closed formula to $N:=\sum_{j=0}^{k/2}\left(\begin{array}{c} n \\ k-j \end{array}\right)\left(\begin{array}{c} k-j \\ j \end{array}\right) $

Published on 21 Oct 2020 - 23:51

score 31 · Answer 15 · 2020-10-25 09:31:31

31

Views

Hadwiger's proof for Borsuk conjecture for smooth and convex bodies.

Published on 25 Oct 2020 - 9:31

List Question

Convex hull of finite set in $\mathbb{R^2}$ is a polygon

Two mathematician try to cover a convex polygon with some convex regions.

A question about the facets of convex polytopes and their intersections

Insight on difference between Euler characteristics of 2 manifolds: $\chi(U)-\chi(V)$?

If a point lies in an affine hull of a convex polytope, outside this polytope, then not all facets are visible from it

Maximum number of edges on a uniform hypergraph

Comparing volumes of $d$-dimensional unit-balls to upper bound kissing-number.

Which convex shapes are the hardest to bind together with a rubber band?

Existence of a finite subset of the unit sphere with a particular orthogonality property

Number of independant paths between a discrete set of points?

Sets of vertices distances

"Perfect" solutions to the kissing number problem besides in dimensions 1,2,8, and 24.

Bijective projection from a unit disk to a unit sphere

Closed formula to $N:=\sum_{j=0}^{k/2}\left(\begin{array}{c} n \\ k-j \end{array}\right)\left(\begin{array}{c} k-j \\ j \end{array}\right) $

Hadwiger's proof for Borsuk conjecture for smooth and convex bodies.

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