K-hub Number of a Graph
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Keywords:
Hub number, K-hub number, Hub setAbstract
In this paper, we introduce the concept of $k-$hub set and $k-$hub number of a graph. We compute the $k-$hub number for some standard graphs, also we determined the $k-$hub number for corona of two graphs. Some bounds of $k-$hub number are established. Finally we characterize the structure of all graphs for which $h_k(G)=1$.
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This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.