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arXiv 0709.1665math.NTmath.CO
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关于二项式系数的几个新同余

On some new congruences for binomial coefficients

Zhi-Wei Sun, Roberto Tauraso

摘要:

本文建立了中心二项式系数和Catalan数的新同余式。设$p$是素数,$a$是任意正整数。我们确定了$d=0,...,p^a$的$\sum_{k=0}^{p^a-1}\binom{2k}{k+d}$ mod $p^2$和$δ=0,1$的$\sum_{k=0}^{p^a-1}\binom{2k}{k+δ}$ mod $p^3$。我们还表明,$$C_n^{-1}\sum_{k=0}^{p^a-1}C_{p^an+k}=1-3(n+1)((p^a-1)/3) (mod p^2)$$对每个n= 0,1,2,.,其中$C_m$是加泰罗尼亚数字$\binom{2m}{m}/(m+1)$,(-)是勒让德符号。

英文摘要:

In this paper we establish some new congruences involving central binomial coefficients as well as Catalan numbers. Let $p$ be a prime and let $a$ be any positive integer. We determine $\sum_{k=0}^{p^a-1}\binom{2k}{k+d}$ mod $p^2$ for $d=0,...,p^a$ and $\sum_{k=0}^{p^a-1}\binom{2k}{k+δ}$ mod $p^3$ for $δ=0,1$. We also show that $$C_n^{-1}\sum_{k=0}^{p^a-1}C_{p^an+k}=1-3(n+1)((p^a-1)/3) (mod p^2)$$ for every n=0,1,2,..., where $C_m$ is the Catalan number $\binom{2m}{m}/(m+1)$, and (-) is the Legendre symbol.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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