On the Letac-Massam Conjecture on cones $Q_{A_{n}}$
Piotr Graczyk, Hideyuki Ishi, Salha Mamane, Hiroyuki Ochiai · Proceedings of the Japan Academy Series A Mathematical Sciences · 2017
We prove, for graphical models for nearest neighbour interactions, a conjecture stated by Letac and Massam in 2007. Our result is important in the analysis of Wishart distributions on cones related to graphical models and in its statistical applications.