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math.ST2025
Tree-structured Ising models under mean parameterization
Benjamin Côté, Hélène Cossette, Etienne Marceau
In the risk modeling literature, the Ising model has emerged as a valuable framework for dependent Bernoulli random variables, as its underlying graphical structure captures comple…
math.PR2025
Extremal negative dependence and the strongly Rayleigh property
Hélène Cossette, Etienne Marceau, Alessandro Mutti +1
We provide a geometrical characterization of extremal negative dependence as a convex polytope in the simplex of multidimensional Bernoulli distributions, and we prove that it is a…