Mathematics – Probability
Scientific paper
2009-05-20
Mathematics
Probability
31 pages, pre-galleys version of accepted paper
Scientific paper
10.1007/s10959-011-0399-7
We study a functional equation whose unknown maps a Euclidean space into the space of probability distributions on [0,1]. We prove existence and uniqueness of its solution under suitable regularity and boundary conditions, we show that it depends continuously on the boundary datum, and we characterize solutions that are diffuse on [0,1]. A canonical solution is obtained by means of a Randomly Reinforced Urn with different reinforcement distributions having equal means. The general solution to the functional equation defines a new parametric collection of distributions on [0,1] generalizing the Beta family.
Aletti Giacomo
May Caterina
Secchi Piercesare
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