Semi-regular relations and digraphs
β Scribed by S.A Choudum; K.R Parthasarathy
- Book ID
- 108046818
- Publisher
- Elsevier Science
- Year
- 1972
- Weight
- 477 KB
- Volume
- 75
- Category
- Article
- ISSN
- 1385-7258
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π SIMILAR VOLUMES
A particular kind of 2-ceU embeddings, called regular, for arc-coloured digraphs is introduced, and a method for constructing both orientable and non-orientable regular embeddings is presented. Furthermore, by using combinatorial concepts and the Euler-Poincar6 formula, we derive upper bounds for bo
## Abstract We prove that every __r__βbiregular digraph with __n__ vertices has its directed diamter bounded by (3__n__ β __r__ β 3)/(__r__ +1). We show that this bound is tight for directed as well as for undirected graphs. The upper bound remains valid for Eulerian digraphs with minimum outdegree