Fisher-like Metrics Associated with <i>ϕ</i>-Deformed (Naudts) Entropies

Abstract

The paper defines and studies new semi-Riemannian generalized Fisher metrics and Fisher-like metrics, associated with entropies and divergences. Examples of seven such families are provided, based on exponential PDFs. The particular case when the basic entropy is a ϕ-deformed one, in the sense of Naudts, is investigated in detail, with emphasis on the variation of the emergent scalar curvatures. Moreover, the paper highlights the impact on these geometries determined by the addition of some group logarithms.

Keywords

• <i>ϕ</i>-deformed (Naudts) entropy
• divergence
• relative group entropy
• generalized Fisher metric
• Fisher-like metric
• MaxEnt problem