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2 votes
1 answer
113 views

Existence of fine approximate of a convex body in $\mathbb R^d$ with convex hull of $\mathcal O(d)$ points

Let $K$ be a convex body in $\mathbb R^d$ which contains the origin and let $\theta \in (0,1)$. Question. Is it always possible to find $n$ points $x_1,\dotsc,x_n \in \mathbb R^d$ such that $$ \theta ...
dohmatob's user avatar
  • 6,853
1 vote
0 answers
153 views

Is there a polynomial expression for the volume of the following set?

Denote the unit $\ell_2$ ball in $\mathbb{R}^n$ as $\mathcal{B}_n$. It is widely kown that for a convex body $\mathcal{K}\subseteq \mathbb{R}^n$, the $n$-dimensional volume of the parallel body $\...
RyanChan's user avatar
  • 550
7 votes
3 answers
377 views

Expected minimum face angle of random convex polyhedron in $\mathbb{R}^3$

Let $P_n$ be a "random convex polyhedron" in $\mathbb{R}^3$ of $n$ vertices, where "random" could follow any one of a number of models: (1) the convex hull of $n$ points randomly and uniformly ...
Joseph O'Rourke's user avatar
2 votes
3 answers
1k views

Draw a Random Line Through a Voronoi Tessellation, What is the Average Number of Voronoi Cell the Line Intersects?

Update: problem reformulation Following the advice in comments, I now restate my problem using Voronoi tessellation. Given a unit hypercube $H_n=\{(x_1,\ldots,x_n)\in \mathbb{R}^n: 0\leq x_i\leq 1\}$...