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New Classes of Extremal Graphs with Given Bandwidth

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Abstract

The bandwidth is an important invariant in both theoretic and applied fields. The extremal graph problem on bandwidth is to determine the minimum size of a graph G with order n and bandwidth B, denoted by m(n, B). The results of m(n, n − 1) and m(n, n − 2) have been known in the literature. This paper studies m(n, n − 3) as well as the extremal graphs. In particular, we concentrate on a relation between m(n, n − 3) and ex(n, C 4), i.e., the maximum size of a graph without 4-cycles. The latter is a well-known open problem proposed by P. Erdös more than 70 years ago.

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Correspondence to Yixun Lin.

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Supported by NSFC (11101383, 61373106), 973 Program of China (2010CB328101).

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Lin, L., Lin, Y. New Classes of Extremal Graphs with Given Bandwidth. Graphs and Combinatorics 31, 149–167 (2015). https://doi.org/10.1007/s00373-013-1386-9

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  • DOI: https://doi.org/10.1007/s00373-013-1386-9

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