Several Functions Originating from Fisher–Rao Geometry of Dirichlet Distributions and Involving Polygamma Functions

Feng Qi and Ravi Prakash Agarwal ()
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Feng Qi: School of Mathematics and Informatics, Henan Polytechnic University, Jiaozuo 454010, China
Ravi Prakash Agarwal: Department of Mathematics, Texas A&M University-Kingsville, Kingsville, TX 78363-8202, USA

Mathematics, 2023, vol. 12, issue 1, 1-21

Abstract: In this paper, the authors review and survey some results published since 2020 about (complete) monotonicity, inequalities, and their necessary and sufficient conditions for several newly introduced functions involving polygamma functions and originating from the estimation of the sectional curvature of the Fisher–Rao geometry of the Dirichlet distributions in the two-dimensional case.

Keywords: sectional curvature; polygamma function; inequality; complete monotonicity; necessary and sufficient condition; lower bound; majorization (search for similar items in EconPapers)
JEL-codes: C (search for similar items in EconPapers)
Date: 2023
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