Article
Details
Citation
Rowlinson P (2010) On multiple eigenvalues of trees. Linear Algebra and Its Applications, 432 (11), pp. 3007-3011. https://doi.org/10.1016/j.laa.2010.01.003
Abstract
Let T be a tree of order n>6 with μ as a positive eigenvalue of multiplicity k. Star complements are used to show that (i) if k>n/3 then μ=1, (ii) if μ=1 then, without restriction on k, T has k+1 pendant edges that form an induced matching. The results are used to identify the trees with a non-zero eigenvalue of maximum possible multiplicity.
Keywords
Graph;
Tree;
Eigenvalue;
Star complement
Journal
Linear Algebra and Its Applications: Volume 432, Issue 11
Status | Published |
---|---|
Publication date | 30/06/2010 |
URL | http://hdl.handle.net/1893/18502 |
Publisher | Elsevier |
ISSN | 0024-3795 |
People (1)
Emeritus Professor, Mathematics