Article ID Journal Published Year Pages File Type
418321 Discrete Applied Mathematics 2014 8 Pages PDF
Abstract

We study the problem of maximizing Betti numbers of simplicial complexes. We prove an upper bound of 1.32n1.32n for the sum of Betti numbers of any nn-vertex flag complex and 1.25n1.25n for the independence complex of a triangle-free graph. These findings imply upper bounds for the Betti numbers of various related classes of spaces, including the neighbourhood complex of a graph. We also make some related observations.

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Physical Sciences and Engineering Computer Science Computational Theory and Mathematics
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