# American Institute of Mathematical Sciences

2014, 4(1): 49-58. doi: 10.3934/naco.2014.4.49

## Adjacent vertex distinguishing edge-colorings and total-colorings of the Cartesian product of graphs

 1 College of Mathematics and Computer Science, Northwest University for Nationalities, Lanzhou 730030, China, China, China 2 College of Management, Northwest University for Nationalities, Lanzhou 730030, China

Received  March 2013 Revised  November 2013 Published  December 2013

Let $G$ be a simple graph with vertex set $V(G)$ and edge set $E(G)$. An edge-coloring $\sigma$ of $G$ is called an adjacent vertex distinguishing edge-coloring of $G$ if $F_{\sigma}(u)\not= F_{\sigma}(v)$ for any $uv\in E(G)$, where $F_{\sigma}(u)$ denotes the set of colors of edges incident with $u$. A total-coloring $\sigma$ of $G$ is called an adjacent vertex distinguishing total-coloring of $G$ if $S_{\sigma}(u)\not= S_{\sigma}(v)$ for any $uv\in E(G)$, where $S_{\sigma}(u)$ denotes the set of colors of edges incident with $u$ together with the color assigned to $u$. The minimum number of colors required for an adjacent vertex distinguishing edge-coloring (resp. an adjacent vertex distinguishing total-coloring) of $G$ is denoted by $\chi_a^{'}(G)$ (resp. $\chi^{''}_{a}(G)$). In this paper, we provide upper bounds for these parameters of the Cartesian product $G$ □ $H$ of two graphs $G$ and $H$. We also determine exact value of these parameters for the Cartesian product of a bipartite graph and a complete graph or a cycle, the Cartesian product of a complete graph and a cycle, the Cartesian product of two trees and the Cartesian product of regular graphs.
Citation: Shuangliang Tian, Ping Chen, Yabin Shao, Qian Wang. Adjacent vertex distinguishing edge-colorings and total-colorings of the Cartesian product of graphs. Numerical Algebra, Control & Optimization, 2014, 4 (1) : 49-58. doi: 10.3934/naco.2014.4.49
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