A q-Analogue of Faulhaber's Formula for Sums of Powers

Details A q-Analogue of Faulhaber's Formula for Sums of Powers A q-Analogue of Faulhaber's Formula for Sums of Powers

2005-01-25

arxiv.org/abs/math/0501441v3

Electron. J. Combin. 11(2) (2005), #R19

Mathematics

Combinatorics

19 pages

Scientific paper

Let $$ S_{m,n}(q):=\sum_{k=1}^{n}\frac{1-q^{2k}}{1-q^2} (\frac{1-q^k}{1-q})^{m-1}q^{\frac{m+1}{2}(n-k)}. $$ Generalizing the formulas of Warnaar and Schlosser, we prove that there exist polynomials $P_{m,k}(q)\in\mathbb{Z}[q]$ such that $$ S_{2m+1,n}(q) =\sum_{k=0}^{m}(-1)^kP_{m,k}(q) \frac{(1-q^n)^{m+1-k}(1-q^{n+1})^{m+1-k}q^{kn}} {(1-q^2)(1-q)^{2m-3k}\prod_{i=0}^{k}(1-q^{m+1-i})}, $$ and solve a problem raised by Schlosser. We also show that there is a similar formula for the following $q$-analogue of alternating sums of powers: $$ T_{m,n}(q):=\sum_{k=1}^{n}(-1)^{n-k} (\frac{1-q^k}{1-q})^{m}q^{\frac{m}{2}(n-k)}. $$

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