Weakly distance-regular digraphs
β Scribed by F. Comellas; M.A. Fiol; J. Gimbert; M. Mitjana
- Book ID
- 108167357
- Publisher
- Elsevier Science
- Year
- 2004
- Tongue
- English
- Weight
- 345 KB
- Volume
- 90
- Category
- Article
- ISSN
- 0095-8956
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π SIMILAR VOLUMES
A digraph is said to be distance-transitive if for all vertices u, v, x, y such that d(u, v) = d(x, y) there is an automorphism w of the digraph such that T(U) = x and T(V) = y. Some examples of distance-transitive digraphs are given in Section 2. Section 3 defines the intersection matrix and gives
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