Factors of Some Lacunary q-Binomial Sums
classification
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keywords
lacunaryqbinombinombinomialdivisibilityequivfactorspmod
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In this paper, we prove a divisibility result for the lacunary $q$-binomial sum $$ \sum_{k\equiv r\pmod{c}}(-1)^kq^{\binom{k}{2}}\qbinom{n}{k}{q}\qbinom{(k-r)/c}{l}{q^{c}}. $$
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