On imbalances in digraphs
Kragujevac Journal of Mathematics, Tome 31 (2008), p. 143 .

Voir la notice de l'article provenant de la source eLibrary of Mathematical Institute of the Serbian Academy of Sciences and Arts

The imbalance of a vertex in a digraph is defined as $b_{v_{i}}(\mbox{or simply\ } b_{i}) =d_{v_{i}}^{+}-d_{v_{i}}^{-}$, where $d_{v_{i}}^{+}$ and $d_{v_{i}}^{-}$ are respectively the outdegree and indegree of $v_i$. The set of imbalances of the vertices in a digraph is called its imbalance set. In this paper, we obtain an inequality for imbalances in simple directed graphs. Also, we give the existence of an oriented graph with a given imbalance set.
Classification : 05C20
Keywords: digraph, imbalance, outdegree, indegree, oriented graph, arc.
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Shariefuddin Pirzada. On imbalances in digraphs. Kragujevac Journal of Mathematics, Tome 31 (2008), p. 143 . http://geodesic.mathdoc.fr/item/KJM_2008_31_a11/