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  (Submitted to The Amer. Math. Monthly ( via H.S.Wilf).)

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http://www.mathe2.uni-bayreuth.de/axel/papers/./zeilberger:kathy_o_haras_constructive_proof_of_the_unimodality_of_the_gaussian_polynomials.ps.gz
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Abstract:

Kathy O'Hara[6][7] has recently solved a long-standing open problem in combinatorics: to find a direct combinatorial proof that the "Gaussian polynomials" G (b,a):=

Citations

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