A q-rious positivity |
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Authors: | S Ole Warnaar W Zudilin |
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Institution: | 1. School of Mathematics and Physics, The University of Queensland, Brisbane, QLD, 4072, Australia 2. School of Mathematical and Physical Sciences, The University of Newcastle, Callaghan, NSW, 2308, Australia
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Abstract: | The q-binomial coefficients ${\genfrac{}{]}{0pt}{}{n}{m}= \prod_{i=1}^m (1-q^{n-m+i})/(1-q^i)}$ , for integers 0??? m??? n, are known to be polynomials with non-negative integer coefficients. This readily follows from the q-binomial theorem, or the many combinatorial interpretations of ${\genfrac{}{]}{0pt}{}{n}{m}}$ . In this note we conjecture an arithmetically motivated generalisation of the non-negativity property for products of ratios of q-factorials that happen to be polynomials. |
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