51 citations
- National Center for Theoretical Sciences, Physics Division16 papers
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math.CO2004★ 1 cited
Distance-two labelings of digraphs
G. J. Chang, J. -J. Chen, D. Kuo +1
For positive integers , an -labeling of a digraph is a function from into the set of nonnegative integers such that if is adja…
math.CO2003
Isometric path numbers of graphs
Jun-Jie Pan, Gerard J. Chang
An isometric path between two vertices in a graph is a shortest path joining them. The isometric path number of , denoted by $\ip(G)$, is the minimum number of isometric pat…