Graphs with Small Bandwidth and Cutwidth

F. R.K. Chung; P. D. Seymour

doi:10.1016/S0167-5060(08)70571-5

Graphs with Small Bandwidth and Cutwidth

F. R.K. Chung, P. D. Seymour

Research output: Contribution to journal › Article › peer-review

6 Scopus citations

Abstract

We give counter-examples to the following conjecture which arose in the study of small bandwidth graphs. “For a graph G, suppose that |V(G')|≤ 1 + c₁ diameter (G') for any connected subgraph G' of G, and that G does not contain any refinement of the complete binary tree of c₂ levels. Is it true that the bandwidth of G can be bounded above by a constant c depending only on c₁and c₂?” On the other hand, we show that if the maximum degree of G is bounded and G does not contain any refinement of a complete binary tree of a specified size, then the cutwidth and the topological bandwidth of G are also bounded.

Original language	English (US)
Pages (from-to)	113-119
Number of pages	7
Journal	Annals of Discrete Mathematics
Volume	43
Issue number	C
DOIs	https://doi.org/10.1016/S0167-5060(08)70571-5
State	Published - Jan 1 1989
Externally published	Yes

All Science Journal Classification (ASJC) codes

Discrete Mathematics and Combinatorics

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10.1016/S0167-5060(08)70571-5

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title = "Graphs with Small Bandwidth and Cutwidth",

abstract = "We give counter-examples to the following conjecture which arose in the study of small bandwidth graphs. “For a graph G, suppose that |V(G')|≤ 1 + c1 diameter (G') for any connected subgraph G' of G, and that G does not contain any refinement of the complete binary tree of c2 levels. Is it true that the bandwidth of G can be bounded above by a constant c depending only on c1and c2?” On the other hand, we show that if the maximum degree of G is bounded and G does not contain any refinement of a complete binary tree of a specified size, then the cutwidth and the topological bandwidth of G are also bounded.",

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AU - Seymour, P. D.

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N2 - We give counter-examples to the following conjecture which arose in the study of small bandwidth graphs. “For a graph G, suppose that |V(G')|≤ 1 + c1 diameter (G') for any connected subgraph G' of G, and that G does not contain any refinement of the complete binary tree of c2 levels. Is it true that the bandwidth of G can be bounded above by a constant c depending only on c1and c2?” On the other hand, we show that if the maximum degree of G is bounded and G does not contain any refinement of a complete binary tree of a specified size, then the cutwidth and the topological bandwidth of G are also bounded.

AB - We give counter-examples to the following conjecture which arose in the study of small bandwidth graphs. “For a graph G, suppose that |V(G')|≤ 1 + c1 diameter (G') for any connected subgraph G' of G, and that G does not contain any refinement of the complete binary tree of c2 levels. Is it true that the bandwidth of G can be bounded above by a constant c depending only on c1and c2?” On the other hand, we show that if the maximum degree of G is bounded and G does not contain any refinement of a complete binary tree of a specified size, then the cutwidth and the topological bandwidth of G are also bounded.

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EP - 119

JO - Annals of Discrete Mathematics

JF - Annals of Discrete Mathematics

IS - C

ER -

Graphs with Small Bandwidth and Cutwidth

Abstract

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