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Regular Graphs, Eigenvalues and Regular Factors

✍ Scribed by Hongliang Lu


Publisher
John Wiley and Sons
Year
2011
Tongue
English
Weight
97 KB
Volume
69
Category
Article
ISSN
0364-9024

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✦ Synopsis


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‐regular graph with the third largest eigenvalue at most has a k‐factor.


πŸ“œ SIMILAR VOLUMES


Regular factors of regular graphs
✍ B. BollobΓ‘s; Akira Saito; N. C. Wormald πŸ“‚ Article πŸ“… 1985 πŸ› John Wiley and Sons 🌐 English βš– 242 KB

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

2-factors in random regular graphs
✍ Robalewska, Hanna D. πŸ“‚ Article πŸ“… 1996 πŸ› John Wiley and Sons 🌐 English βš– 474 KB πŸ‘ 3 views

In this paper the expectation and variance of the number of 2-factors in random r-regular graphs for any fixed r 2 3 is analyzed and the asymptotic distribution of this variable is determined.

Regular factors in K1,3-free graphs
✍ S. A. Choudum; M. S. Paulraj πŸ“‚ Article πŸ“… 1991 πŸ› John Wiley and Sons 🌐 English βš– 247 KB πŸ‘ 1 views

## Abstract We show that every connected __K__~1,3~‐free graph with minimum degree at least __2k__ contains a __k__‐factor and construct connected __K__~1,3~‐free graphs with minimum degree __k__ + __0__(√__k__) that have no __k__‐factor.

Almost-regular factorization of graphs
✍ Jin Akiyama; Mikio Kano πŸ“‚ Article πŸ“… 1985 πŸ› John Wiley and Sons 🌐 English βš– 238 KB

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 +

Counting 1-Factors in Regular Bipartite
✍ Alexander Schrijver πŸ“‚ Article πŸ“… 1998 πŸ› Elsevier Science 🌐 English βš– 325 KB

We show that any k-regular bipartite graph with 2n vertices has at least \ (k&1) k&1 k k&2 + n perfect matchings (1-factors). Equivalently, this is a lower bound on the permanent of any nonnegative integer n\_n matrix with each row and column sum equal to k. For any k, the base (k&1) k&1 Γ‚k k&2 is l