Document Type

Article

Department/Program

Biology

Journal Title

Discrete Mathematics

Pub Date

2012

Volume

312

Issue

7

First Page

1314

Abstract

We generalize the class of split graphs to the directed case and show that these split digraphs can be identified from their degree sequences. The first degree sequence characterization is an extension of the concept of splittance to directed graphs, while the second characterization says a digraph is split if and only if its degree sequence satisfies one of the Fulkerson inequalities (which determine when an integer-pair sequence is digraphic) with equality. (C) 2012 Elsevier B.V. All rights reserved.

DOI

10.1016/j.disc.2011.12.023

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