3 problems

Under Assumption … sigma^Y{i,j}geq sigma^X{i,j}geq 0 … operatorname{Cov}(log SN({mathbf G}),pi({mathbf G})pj({mathbf G}))leq 0. … ; its resolution is not indicated in the supplied…

Let $G=(V,A)$ be a directed acyclic graph, and let $\Sigma$ denote the covariance matrix of its arc-indicator variables. Covariance-matrix sparsity conjecture. The covariance matri…

Let $G=(V,A)$ be a directed acyclic graph, with arcs represented by indicator random variables $A_{ij}$ and covariance matrix $\Sigma$. Two arcs are incident when they share a comm…