A Probabilistic Approach to the Descent Statistic

نویسندگان

  • Richard Ehrenborg
  • Michael Levin
  • Margaret Readdy
چکیده

We present a probabilistic approach to studying the descent statistic based upon a two-variable probability density. This density is log concave and, in fact, satisfies a higher order concavity condition. From these properties we derive quadratic inequalities for the descent statistic. Using Fourier series, we give exact expressions for the Euler numbers and the alternating r-signed permutations. We also obtain a probabilistic interpretation of the sin function. © 2002 Elsevier Science (USA)

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عنوان ژورنال:
  • J. Comb. Theory, Ser. A

دوره 98  شماره 

صفحات  -

تاریخ انتشار 2002