• ON LINE-BLOCK GRAPHS

V. R. Kulli*

Abstract


In this paper, we introduce the concept of the line block graph of a graph. We establish some properties of this graph. Also characterizations are given for graphs G for which (i) line-block graph of G is a tree and (ii)the line-block graph of G and G are isomorphic. We establish some relationships between (i) line-block graph and line graph and (ii) line-block graph and block graph.


Keywords


line-block graph, qlick graph, line graph, block graph.

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