On D-Distance and D-Closed Graphs
Keywords:D-distance, D-boundary vertex, D-interior vertex, D-null vertex, D-closure, D-closed graphs
This paper studies the concepts of D-boundary vertex, D-interior vertex, D-null vertex, D-closure of a graph and D-closed graph, based on the idea of D-distance. We investigate the structural properties of these concepts and determine whether some special classes of graphs are D-closed or not.
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