Recognizing clique graphs of directed edge path graphs

نویسندگان

  • Marisa Gutierrez
  • João Meidanis
چکیده

Directed edge path graphs are the intersection graphs of directed paths in a directed tree, viewed as sets of edges. They were studied by Monma and Wei (J. Comb. Theory B 41 (1986) 141–181) who also gave a polynomial time recognition algorithm. In this work, we show that the clique graphs of these graphs are exactly the two sections of the same kind of path families, and give a polynomial time recognition algorithm for them. ? 2002 Elsevier Science B.V. All rights reserved.

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عنوان ژورنال:
  • Discrete Applied Mathematics

دوره 126  شماره 

صفحات  -

تاریخ انتشار 2003