Duality for Finite Multiple Harmonic q-Series

Details Duality for Finite Multiple Harmonic q-Series Duality for Finite Multiple Harmonic q-Series

2004-02-06

arxiv.org/abs/math/0402092v2

Discrete Mathematics, 300 (2005), no. 1--3, pp. 44--56. MR2170113 (2006m:05019)

Mathematics

Combinatorics

12 pages AMSLaTeX. Submitted for publication October 26, 2003; revised September 14, 2004. New title reflects change in emphas

Scientific paper

10.1016/j.disc.2005.06.008

We define two finite q-analogs of certain multiple harmonic series with an arbitrary number of free parameters, and prove identities for these q-analogs, expressing them in terms of multiply nested sums involving the Gaussian binomial coefficients. Special cases of these identities--for example, with all parameters equal to 1--have occurred in the literature. The special case with only one parameter reduces to an identity for the divisor generating function, which has received some attention in connection with problems in sorting theory. The general case can be viewed as a duality result, reminiscent of the duality relation for the ordinary multiple zeta function.

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