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Biclique graphs of interval bigraphs. (English) Zbl 1440.05132

Summary: The biclique graph \( K B ( G )\) is the intersection graph of all the bicliques of a graph \(G\). The aim of our work is to recognize graphs that are biclique graphs of interval bigraphs \(( \mathcal{IBG} )\). In this paper we prove that \(K B ( \mathcal{IBG} ) \subset K_{1 , 4} \)-free co-comparability graphs. We also study the class of biclique graphs of proper interval bigraphs \(( \mathcal{PIB} )\). Recall that \(\mathcal{PIB}\) is equal to the class of bipartite permutation graphs \(( \mathcal{BPG} )\). We present a characterization of the class \(K B ( \mathcal{PIB} )\) and of the biclique graphs of a subclass of \(\mathcal{PIB}\) that leads to a polynomial time recognition algorithm. We also present characterizations of biclique graphs of some classes such as complete graphs, trees and graphs with girth at least 5.

MSC:

05C38 Paths and cycles

Software:

ILIGRA
Full Text: DOI

References:

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