Line digraphs and coreflexive vertex sets
β Scribed by Xinming Liu; Douglas B. West
- Book ID
- 108316242
- Publisher
- Elsevier Science
- Year
- 1998
- Tongue
- English
- Weight
- 441 KB
- Volume
- 188
- Category
- Article
- ISSN
- 0012-365X
No coin nor oath required. For personal study only.
π SIMILAR VOLUMES
## Abstract Consider two maps __f__ and __g__ from a set __E__ into a set __F__ such that __f__(__x__)ββ βg(__x__) for every __x__ in __E__. Suppose that there exists a positive integer __n__ such that for any element __z__ in __F__ either __f__^β1^(__z__) or __g__^β1^(__z__) has at most __n__ eleme
A nonidentity element of a permutation group is said to be semiregular if all of its orbits have the same length. The work in this paper is linked to [6] where the problem of existence of semiregular automorphisms in vertex-transitive digraphs was posed. It was observed there that every vertextransi
A digraph D is called a quasi-transitive digraph (QTD) if for any triple x,y,z of distinct vertices of D such that (x,y) and (y,z) are arcs of D there is at least one at': from x to z or from z to x. Solving a conjecture by Bangdensen and Huang (1995), Gutin (1995) described polynomial algorithms fo