Marianne Moore

Marianne Winder

The unexpected death of Marianne Winder occurred peacefully in London on 6 April 2001 following a short illness. For over thirty years Marianne Winder had been associated with the library of the Wellcome Institute for the History of Medicine, first as Assistant Librarian then as Curator of Oriental MSS and Printed Books and, finally, as Consultant in Tibetan Medicine. Marianne Winder was born i...

INGE ALFERINK and MARIANNE GULLBERG

Underhill Moore

Very few Moore Graphs

We prove here a well known result in graph theory, originally proved by Hoffman and Singleton, that any non-trivial Moore graph of diameter 2 is regular of degree k = 2, 3, 7 or 57. The existence (and uniqueness) of these graphs is known for k = 2, 3, 7 while it is still an open problem if there is a moore graph of degree 57 or not.

Multipartite Moore Digraphs

We derive some Moore-like bounds for multipartite digraphs, which extend those of bipartite digraphs, assuming that every vertex of a given partite set is adjacent to the same number of vertices (δ) in each of the other independent sets. We determine when a Moore multipartite digraph is weakly distanceregular. Within this framework, some necessary conditions for the existence of a Moore r-parti...