Rikio Ichishima

activity

20222024

collaborators

3 papers

math.CO2024

Ramsey theory and strength of graphs

Rikio Ichishima, Francesc A Muntaner-Batle, Yukio Takahashi

A numbering $f$ of a graph $G$ of order $n$ is a labeling that assigns distinct elements of the set ${1, 2, \dots, n}$ to the vertices of $G$ , where each $uv\in E\lef…

math.CO2023

A method to compute the strength using bounds

Rikio Ichishima, Francesc A. Muntaner-Batle, Yukio Takahashi

A numbering $f$ of a graph $G$ of order $n$ is a labeling that assigns distinct elements of the set ${1, 2, \dots, n}$ to the vertices of $G$ . The strength $\mathrm{str}\left(G\…

math.CO2022

Recent studies on the super edge-magic deficiency of graphs

Rikio Ichishima, S. C. López, Francesc A. Muntaner-Batle +1

A graph $G$ is called edge-magic if there exists a bijective function $f:V\left(G\right) \cup E\left(G\right)\rightarrow \left\{1, 2, \ldots , \left\vert V\left( G\right) \right\ve…