Zhao Guangfu
Abstract
Abstract The main results of this paper are two characterizations of second iterated line graphs, i.e., two sets of necessary and sufficient conditions for the existence of solutions to the graph equation H = L2(G). A method to get a root of the graph equation is also given if one exists.
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Abstract The main results of this paper are two characterizations of second iterated line graphs, i.e., two sets of necessary and sufficient conditions for the existence of solutions to the graph equation H = L2(G). A method to get a root of the graph equation is also given if one exists.
Key concepts: Iterated function, Mathematics, Line graph, Combinatorics, Graph, Discrete mathematics, Block graph, Line (geometry)