Letac, Gérard; Massam, Hélène - In: Statistics & Probability Letters 38 (1998) 3, pp. 247-253
Let (X1, X2,..., Xq) have the multivariate dirichlet distribution with parameters (p1, p2,..., pq), on the linear space of symmetric (r, r) real matrices. We prove that for a given set of positive numbers f1, f2,..., fq one has . This extends a useful formula already known in dimension r = 1.