𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Algorithms for constructing graphs and digraphs with given valences and factors

✍ Scribed by D.J. Kleitman; D.L. Wang


Publisher
Elsevier Science
Year
1973
Tongue
English
Weight
942 KB
Volume
6
Category
Article
ISSN
0012-365X

No coin nor oath required. For personal study only.

✦ Synopsis


Given a set of valences ( ui) such that { ui> and (vi-k} are both realizable as valences of graphs without loops or multiple edges, an explicit conslruction method is described for obtaining a graph with valences {ui] having a k-factor. A number of extensions of the result are obtained. Similar results are obtained for directed graphs.


πŸ“œ SIMILAR VOLUMES


Graphs and digraphs with given girth and
✍ Jiping Liu; ; Huishan Zhou πŸ“‚ Article πŸ“… 1994 πŸ› Elsevier Science 🌐 English βš– 230 KB

In this paper, we show that for any given two positive integers g and k with g > 3, there exists a graph (digraph) G with girth g and connectivity k. Applying this result, we give a negative answer to the problem proposed by M. Junger, G. Reinelt and W.R Pulleyblank (1985).

The maximum valency of regular graphs wi
✍ Guo-Hui Zhang πŸ“‚ Article πŸ“… 1992 πŸ› John Wiley and Sons 🌐 English βš– 294 KB πŸ‘ 1 views

## Abstract The odd girth of a graph __G__ is the length of a shortest odd cycle in __G__. Let __d__(__n, g__) denote the largest __k__ such that there exists a __k__‐regular graph of order __n__ and odd girth __g__. It is shown that __d____n, g__ β‰₯ 2|__n__/__g__β‰₯ if __n__ β‰₯ 2__g__. As a consequenc

Efficient and Constructive Algorithms fo
✍ Hans L. Bodlaender; Ton Kloks πŸ“‚ Article πŸ“… 1996 πŸ› Elsevier Science 🌐 English βš– 373 KB

In this paper we give, for all constants k, l, explicit algorithms that, given a graph Ε½ . Gs V,E with a tree-decomposition of G with treewidth at most l, decide Ε½ . whether the treewidth or pathwidth of G is at most k, and, if so, find a Ε½ . tree-decomposition or path-decomposition of G of width at

An algorithm for construction of a k-con
✍ Ulrich Schumacher πŸ“‚ Article πŸ“… 1984 πŸ› John Wiley and Sons 🌐 English βš– 470 KB

Two fundamental considerations in the design of a communication network are reliability and maximum transmission delay. In this paper we give an algorithm for construction of an undirected graph with n vertices in which there are k node-disjoint paths between any two nodes. The generated graphs will

An intermediate value theorem for graphs
✍ Pavol Hell; Louis V. Quintas πŸ“‚ Article πŸ“… 1979 πŸ› John Wiley and Sons 🌐 English βš– 312 KB

## Abstract For a positive integer __n__ and a finite group __G__, let the symbols __e__(__G, n__) and __E__(__G, n__) denote, respectively, the smallest and the greatest number of lines among all __n__‐point graphs with automorphism group __G__. We say that the Intermediate Value Theorem (IVT) hol