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Separation dimension of bounded degree graphs
N. Alon, M. Basavaraju, L.S. Chandran, R. Mathew,
Published in Society for Industrial and Applied Mathematics Publications
2015
Volume: 29
   
Issue: 1
Pages: 59 - 64
Abstract
The separation dimension of a graph G is the smallest natural number k for which the vertices of G can be embedded in Rk such that any pair of disjoint edges in G can be separated by a hyperplane normal to one of the axes. Equivalently, it is the smallest possible cardinality of a family F of total orders of the vertices of G such that for any two disjoint edges of G, there exists at least one total order in F in which all the vertices in one edge precede those in the other. In general, the maximum separation dimension of a graph on n vertices is Θ(log n). In this article, we focus on bounded degree graphs and show that the separation dimension of a graph with maximum degree d is at most 29 log ∗ d d. We also demonstrate that the above bound is nearly tight by showing that, for every d, almost all d-regular graphs have separation dimension at least ⌈d/2⌉. © 2015 Society for Industrial and Applied Mathematics.
About the journal
JournalSIAM Journal on Discrete Mathematics
PublisherSociety for Industrial and Applied Mathematics Publications
ISSN08954801