On the distribution of eigenvalues of a simple undirected graph
β Scribed by Xuerong Yong
- Publisher
- Elsevier Science
- Year
- 1999
- Tongue
- English
- Weight
- 86 KB
- Volume
- 295
- Category
- Article
- ISSN
- 0024-3795
No coin nor oath required. For personal study only.
β¦ Synopsis
For a simple, undirected graph q n , let k i q n be the ith largest eigenvalue of q n . This paper presents mainly the following: 1. For n P 4, if q n is incomplete, then
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Seven sucient and necessary conditions such that k 2 q n Γ1.
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k 3 q n Γ1 implies that k j q n Γ1Y j 3Y 4Y F F F Y n Γ 1.
π SIMILAR VOLUMES
In the note, we present an upper bound for the spectral radius of Laplacian matrix of a graph in terms of a "2-degree" of a vertex.
Nilli, A., On the second eigenvalue of a graph, Discrete Mathematics 91 (1991) 207-210. It is shown that the second largest eigenvalue of the adjacency matrix of any G containing two edges the distance between which is at least 2k + 2 is at least (2G -l)/(k + 1).
Each k-strongly connected orientation of an undirect:7d I.&P A \_an be obtained from any other k-strongly connected orientation by reversing consec aLir :!I 3irected paths or circuits without destroying the k-strong connectivity.