A $q$-analog of Ljunggren's binomial congruence
A $q$-analog of Ljunggren's binomial congruence
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发表时间:
2011-03
影响因子:
0.7
通讯作者:
A. Straub
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作者:
A. Straub
We prove a $q$-analog of a classical binomial congruence due to Ljunggren which states that $\binom{ap}{bp} \equiv \binom{a}{b}$ modulo $p^3$ for primes $p \geq 5$. This congruence subsumes and builds on earlier congruences by Babbage, Wolstenholme and Glaisher for which we recall existing $q$-analogs. Our congruence generalizes an earlier result of Clark.