Behaviors of $φ$-exponential distributions in Wasserstein geometry and an evolution equation

Details Behaviors of $φ$-exponential distributions in Wasserstein geometry and an evolution equation Behaviors of $φ$-exponential distributions in Wasserstein geometry and an evolution equation

2011-09-30

arxiv.org/abs/1109.6776v1

Mathematics

Metric Geometry

13 pages

Scientific paper

A $\phi$-exponential distribution is a generalization of an exponential distribution associated to functions $\phi$ in an appropriate class, and the space of $\phi$-exponential distributions has a dually flat structure. We study features of the space of $\phi$-exponential distributions, such as the convexity in Wasserstein geometry and the stability under an evolution equation. From this study, we provide the new characterizations to the space of Gaussian measures and the space of $q$-Gaussian measures.

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