A Simple Proof of a Conjecture of Simion
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Yi Wang
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Article
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2002
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Elsevier Science
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English
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Simion had a unimodality conjecture concerning the number of lattice paths in a rectangular grid with the Ferrers diagram of a partition removed. Hildebrand recently showed the stronger result that these numbers are log concave. Here we present a simple proof of Hildebrand's result.