Matching Tag: random-polytopes
Let d d d and n n n be as in the beta-polytope model, and fix parameters β 1 , … , β n ≥ − 1 \beta_1,\ldots,\beta_n\geq -1 β 1 , … , β n ≥ − 1 . Write P n , d β 1 , … , β n \mathscr{P}_{n,d}^{\beta_1,\ldots,\beta_n} P n , d β 1 , … , β n for the corresponding beta…
Let N , d f i n N N,dfin\mathbb{N} N , df in N satisfy N ≥ d + 2 N\geq d+2 N ≥ d + 2 . For a partition [ N ] = A ∪ B [N]=A\cup B [ N ] = A ∪ B , let P d ( A , B ) \mathbb{P}_d(A,B) P d ( A , B ) denote the probability that ( A , B ) (A,B) ( A , B ) is a Radon partition among N N N independent ra…
For n ∈ N n\in\mathbb{N} n ∈ N , let N n N_n N n be a Poisson random variable with parameter n n n , and let P N n , d \bbbeta \mathcal{P}_{N_n,d}^{\bbbeta} P N n , d \bbbeta and P n , d \bbbeta \mathcal{P}_{n,d}^{\bbbeta} P n , d \bbbeta denote the corresponding…
Let \bbbeta = ( β 1 , … , β m ) \bbbeta=(\beta_1,\ldots,\beta_m) \bbbeta = ( β 1 , … , β m ) be the block-parameter vector for the block-beta random polytope P n , d \bbbeta \mathcal{P}_{n,d}^{\bbbeta} P n , d \bbbeta . Negative-parameter extension conjecture. The…
Let d = d 1 + ⋯ + d m d=d_1+\cdots+d_m d = d 1 + ⋯ + d m , let \bbbeta \bbbeta \bbbeta be the block-parameter vector, and let P d , d \bbbeta \mathcal{P}_{d,d}^{\bbbeta} P d , d \bbbeta be the associated block-beta random polytope. All-face-dimensions conject…
Let m ∈ N m\in\mathbb{N} m ∈ N . For i ∈ 1 , … , m i\in\\{1,\dotsc,m\\} i ∈ 1 , … , m , let K i ⊂ R d i K_i\subset \mathbb{R}^{d_i} K i ⊂ R d i be a convex body whose boundary is twice differentiable with positive Gaussian curvature everywh…
Let P P P be a simplicial d d d -polytope with 2 d 2d 2 d vertices. Two facets are estranged if they are disjoint. Von Stengel's conjecture. The maximum number of pairs of estranged facets of…
Let Z d typ \mathcal Z_d^{\text{typ}} Z d typ denote the typical Poisson zero cell, and let f 0 ( Z d typ ) f_0(\mathcal Z_d^{\text{typ}}) f 0 ( Z d typ ) be its number of vertices. Large-deviation conjecture. As…
Fix k ∈ { 2 , 3 , … } k\in\{2,3,\ldots\} k ∈ { 2 , 3 , … } and sample k k k vertices uniformly at random from the vertices of the random polytope conv Π d , 1 \operatorname{conv}\Pi_{d,1} conv Π d , 1 . Let…
Let U 1 , … , U N U_1,\ldots,U_N U 1 , … , U N be independent random vectors in R d \mathbb{R}^d R d with beta density … where β > − 1 \beta>-1 β > − 1 , B d = x ∈ R d : ∣ x ∣ ≤ 1 \mathbb B^d=\\{x\in\mathbb{R}^d:\\|x\\|\leq 1\\} B d = x ∈ R d : ∣ x ∣ ≤ 1 , and v m v_m v m denotes the…
Let d ∈ N d\in\mathbb{N} d ∈ N and k ∈ { 0 , … , d − 1 } k\in\{0,\ldots,d-1\} k ∈ { 0 , … , d − 1 } . Write V d \mathcal{V}_d V d for the Poisson–Voronoi polytope in dimension d d d , and let E f k ( V d ) \mathbb{E}f_k(\mathcal{V}_d) E f k ( V d ) denote its expected…
Let n ∈ N n\in\mathbb{N} n ∈ N and k ∈ { 1 , … , n } k\in\{1,\ldots,n\} k ∈ { 1 , … , n } . Let β > ( n − 1 ) / 2 \beta>(n-1)/2 β > ( n − 1 ) /2 be an integer or half-integer, and let J ~ n , k ( β ) \tilde{\mathbb{J}}_{n,k}(\beta) J ~ n , k ( β ) denote the corresponding dual expected i…
Let β ≥ − 1 \beta\geq -1 β ≥ − 1 be an integer or half-integer, and let n ∈ N n\in\mathbb{N} n ∈ N and k ∈ { 1 , … , n } k\in\{1,\ldots,n\} k ∈ { 1 , … , n } . The quantity J n , k ( β ) \mathbb{J}_{n,k}(\beta) J n , k ( β ) denotes the expected internal-angle sum…