We obtain a generalization of Turán's theorem for graphs whose edges are assigned integer weights. We also characterize the extremal graphs in certain cases.
A generalization of Turán's theorem
✍ Scribed by Benny Sudakov; Tibor Szabó; H. Van Vu
- Publisher
- John Wiley and Sons
- Year
- 2005
- Tongue
- English
- Weight
- 94 KB
- Volume
- 49
- Category
- Article
- ISSN
- 0364-9024
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✦ Synopsis
Abstract
In this paper, we obtain an asymptotic generalization of Turán's theorem. We prove that if all the non‐trivial eigenvalues of a d‐regular graph G on n vertices are sufficiently small, then the largest K~t~‐free subgraph of G contains approximately (t − 2)/(t − 1)‐fraction of its edges. Turán's theorem corresponds to the case d = n − 1. © 2005 Wiley Periodicals, Inc. J Graph Theory
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