A Bound on the Overlap of Same-Sized Subsets


We prove a new lower bound on the number of shared elements of any pair of same-sized subsets drawn from a given set.

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Correspondence to Olof Sivertsson.

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Received April 28, 2006

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Sivertsson, O., Flener, P. & Pearson, J. A Bound on the Overlap of Same-Sized Subsets. Ann. Comb. 12, 347–352 (2008). https://doi.org/10.1007/s00026-008-0355-0

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  • extremal set theory
  • double counting
  • convexity

AMS Subject Classification:

  • 05D05