# Weighted-1-antimagic graphs of prime power order

Po Yi Huang, Tsai Lien Wong, Xuding Zhu

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)

## Abstract

Suppose G is a graph, k is a non-negative integer. We say G is weighted-k-antimagic if for any vertex weight function w:V→N, there is an injection f:E→1,2,⋯,|E|+k such that for any two distinct vertices u and v, ∑e∈E(v)f(e)+w(v)≠∑e∈E(u)f(e)+w(u). There are connected graphs G≠K2 which are not weighted-1-antimagic. It was asked in Wong and Zhu (in press) [13] whether every connected graph other than K2 is weighted-2-antimagic, and whether every connected graph on an odd number of vertices is weighted-1-antimagic. It was proved in Wong and Zhu (in press) [13] that if a connected graph G has a universal vertex, then G is weighted-2-antimagic, and moreover if G has an odd number of vertices, then G is weighted-1-antimagic. In this paper, by restricting to graphs of odd prime power order, we improve this result in two directions: if G has odd prime power order pz and has total domination number 2 with the degree of one vertex in the total dominating set not a multiple of p, then G is weighted-1-antimagic. If G has odd prime power order pz, p≠3 and has maximum degree at least |V(G)|-3, then G is weighted-1-antimagic.

Original language English 2162-2169 8 Discrete Mathematics 312 14 https://doi.org/10.1016/j.disc.2011.09.019 Published - 2012 Jul 28

## All Science Journal Classification (ASJC) codes

• Theoretical Computer Science
• Discrete Mathematics and Combinatorics

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