Yumiko Ohno

activity

20202023

most citedOn a constant curvature statistical manifold

2 citations · 3 across the 5 of their papers we have counts for

collaborators

5 papers

math.DG2023

Homogeneous Structures on $S^{2} \times R$ and $H^{2} \times R$

Yu Ohno

We determine all the homogeneous structure tensors on $S^{2} \times R$ and $H^{2} \times R$ . This work together with previous articles yields a complete…

math.DG2023★ 1 cited

A characterization of the alpha-connections on the statistical manifold of multivariate normal distributions

Shimpei Kobayashi, Yu Ohno

We study a statistical manifold $(N, g^{F}, \nabla^{A}, \nabla^{A *})$ of multivariate normal distributions, where $g^{F}$ is the Fisher metric and $\nabla^{A}$ is the Amari-C…

math.CO2021

Difference of facial achromatic numbers between two triangular embeddings of a graph

Kengo Enami, Yumiko Ohno

A facial $3$ -complete $k$ -coloring of a triangulation $G$ on a surface is a vertex $k$ -coloring such that every triple of $k$ -colors appears on the boundary of some face of $G$ . Th…

math.CO2021

The existence of uniform hypergraphs for which interpolation property of complete coloring fails

Nastaran Haghparast, Morteza Hasanvand, Yumiko Ohno

In 1967 Harary, Hedetniemi, and Prins showed that every graph $G$ admits a complete $t$ -coloring for every $t$ with $χ (G) \leq t \leq ψ (G)$ , where $χ (G)$ denotes the chromatic number…

math.DG2020★ 2 cited

On a constant curvature statistical manifold