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A note on the characteristic rank and related numbers (1307.3031v1)
Published 11 Jul 2013 in math.AT, math.CO, math.DG, and math.NT
Abstract: This note quantifies, via a sharp inequality, an interplay between (a) the characteristic rank of a vector bundle over a topological space X, (b) the Z/2Z-Betti numbers of X, and (c) sums of the numbers of certain partitions of integers. In a particular context, (c) is transformed into a sum of the readily calculable Betti numbers of the real Grassmann manifolds.
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