Yumiko Ohno

collaborators

3 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

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

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…

Homogeneous Structures on S2×R and H2×R

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

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

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