Given r 3 3 and 1 s A s r, we determine all values of k for which every r-regular graph with edge-connectivity A has a k-factor. Some of the earliest results in graph theory are due to Petersen [8] and concern factors in graphs. Among others, Petersen proved that a regular graph of even degree has a
Almost-regular factorization of graphs
β Scribed by Jin Akiyama; Mikio Kano
- Publisher
- John Wiley and Sons
- Year
- 1985
- Tongue
- English
- Weight
- 238 KB
- Volume
- 9
- Category
- Article
- ISSN
- 0364-9024
No coin nor oath required. For personal study only.
β¦ Synopsis
For integers a and b, 0 s a s b, an [a,bl-graph G satisfies a s deg(x,G) s b for every vertex x of G, and an [a.bl-factor is a spanning subgraph
its edges can be decomposed into [a,bl-factors. When both k and tare positive integers and s is a nonnegative integer, w e prove that every [(12k + 2)t + 2ks, (12k + 4)t + 2ksl-graph is [2k,2k + 11-factorable. As its corollary, w e prove that every [r,r + 11-graph with r 3 12k2 + 2k is [2k,2k + 11factorable, which is a partial extension of the two results, one by Thomassen and the other by Era.
π SIMILAR VOLUMES
It can easily be seen that a conjecture of RUNGE does not hold for a class of graphs whose members will be called "almost regular". This conjecture is replaced by a weaker one, and a classification of almost regular graphs is given.
## Abstract For __k__β=β1 and __k__β=β2, we prove that the obvious necessary numerical conditions for packing __t__ pairwise edgeβdisjoint __k__βregular subgraphs of specified orders __m__~1~,__m__~2~,β¦ ,__m__~t~ in the complete graph of order __n__ are also sufficient. To do so, we present an edge
## Abstract In this article, we obtain a sufficient condition for the existence of regular factors in a regular graph in terms of its third largest eigenvalue. We also determine all values of __k__ such that every __r__βregular graph with the third largest eigenvalue at most has a __k__βfactor.