Information Geometry of the Probability Simplex: A Short Course

11/05/2019
by   Giovanni Pistone, et al.
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This set of notes is intended for a short course aiming to provide an (almost) self-contained and (almost) elementary introduction to the topic of Information Geometry (IG) of the probability simplex. Such a course can be considered an introduction to the original monograph by Amari and Nagaoka (2000), and to the recent monographs by Amari (2016 and by Ay et al. (2017). The focus is on a non-parametric approach, that is, I consider the geometry of the full probability simplex and compare the IG formalism with what is classically done in Statistical Physics.

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