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-kernels in -transitive and -quasi-transitive digraphs

✍ Scribed by César Hernández-Cruz; Hortensia Galeana-Sánchez


Book ID
113567693
Publisher
Elsevier Science
Year
2012
Tongue
English
Weight
248 KB
Volume
312
Category
Article
ISSN
0012-365X

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## Abstract A __quasi‐kernel__ in a digraph is an independent set of vertices such that any vertex in the digraph can reach some vertex in the set via a directed path of length at most two. Chvátal and Lovász proved that every digraph has a quasi‐kernel. Recently, Gutin et al. raised the question o