arXiv:math/0111120 [math.GT]AbstractReferencesReviewsResources
Growth of Betti Numbers
Published 2001-11-09Version 1
Suppose X is any finite complex with vanishing L^2 Betti number. We prove upper bounds on the Betti numbers for regular coverings of X, sublinear in the order of covering. The bounds are sensitive to the Novikov-Shubin invariants of X, and are improved in the presence of a spectral gap.
Comments: 22 pages
Subjects: 57M10
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