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16 April 2024
 
  » arxiv » 1012.4234

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Congruences concerning Legendre polynomials III
Zhi-Hong Sun ;
Date 20 Dec 2010
AbstractLet $p>3$ be a prime, and let $m$ be an integer with $p mid m$. In the paper we solve some conjectures of Z.W. Sun concerning $sum_{k=0}^{p-1}frac{(6k)!}{m^k(3k)!k!^3}mod p$, and show that for integers $m,n$ with $p mid m$, $$Big(sum_{x=0}^{p-1}Big(frac{x^3+mx+n}pBig)Big)^2e Big(frac{-3m}pBig) sum_{k=0}^{[p/6]}frac{(6k)!}{(3k)!k!^3}Big(frac{4m^3+27n^2}{12^3cdot 4m^3}Big)^kmod p,$$ where $sls ap$ is the Legendre symbol and $[x]$ is the greatest integer function.
Source arXiv, 1012.4234
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