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arXiv math/0403064math.CO
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两个新的q-正整数族

Two new families of q-positive integers

Sharon J. X. Hou, Jiang Zeng

摘要:

令$n,p,k$为三个正整数。证明了$q$:$${n \brack k}_{q} {}_3ϕ_{2} [ . {matrix}q^{1-k},q^{-p},q^{p-n} q,q^{1-n} {matrix}| q;q^{k+1}]\quad\textrm{and}\quad q^{(n-p)p}\qbi{n}{k}{q} {}_3ϕ_2[ . {matrix}q^{1-k},q^{-p},q^{p-n} q,q^{1-n} {matrix}|q;q] $$的有理分式是$q$的正整数系数多项式.这以与经典$q$ -二项式系数细化普通二项式系数相同的方式推广了Lassalle(Ann.Comb.6(2002),no.3 -4,399-405)的最近结果。

英文摘要:

Let $n,p,k$ be three positive integers. We prove that the rational fractions of $q$: $${n \brack k}_{q} {}_3ϕ_{2} [ . {matrix}q^{1-k},q^{-p},q^{p-n} q,q^{1-n} {matrix}| q;q^{k+1}]\quad\textrm{and}\quad q^{(n-p)p}\qbi{n}{k}{q} {}_3ϕ_2[ . {matrix}q^{1-k},q^{-p},q^{p-n} q,q^{1-n} {matrix}|q;q] $$ are polynomials of $q$ with positive integer coefficients. This generalizes a recent result of Lassalle (Ann. Comb. 6(2002), no. 3-4, 399-405), in the same way as the classical $q$-binomial coefficients refine the ordinary binomial coefficients.

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