F. Komaki

collaborators

3 papers

math.ST2026

Bayesian Prediction in Gamma Models: Admissibility and Infinitesimal Prediction

Fumiyasu Komaki

We study estimation and prediction in the Gamma model $Ga (I^\pm, I^^{2})$ , where the shape parameter $I^\pm$ is known and the scale parameter $I^^{2}$ is unknown, under the Kullback--Lei…

stat.CO2025

Minimization of Functions on Dually Flat Spaces Using Geodesic Descent Based on Dual Connections

Gaku Omiya, Fumiyasu Komaki

We propose geodesic-based optimization methods on dually flat spaces, where the geometric structure of the parameter manifold is closely related to the form of the objective functi…

math.ST2025

Asymptotic mixed normality of maximum likelihood estimator for Ewens--Pitman partition

Takuya Koriyama, Takeru Matsuda, Fumiyasu Komaki

This paper investigates the asymptotic properties of parameter estimation for the Ewens--Pitman partition with parameters $0 < I^\pm < 1$ and $I^¸ > - I^\pm$ . Especially, we show that the maximu…