A remark on Zoloterav's theorem

Details A remark on Zoloterav's theorem A remark on Zoloterav's theorem

2006-01-02

arxiv.org/abs/math/0601026v1

Mathematics

Number Theory

8 pages

Scientific paper

Let n>=3 be an odd integer. For any integer a prime to n, define the permutation gamma_{a,n} of {1,...,(n-1)/2} by gamma_{a,n}(x)=n-\dec{ax}_n if {ax}_n>=(n+1)/2, and {ax}_n if {ax}_n<=(n-1)/2, where {x}_n denotes the least nonnegative residue of x modulo n. In this note, we show that the sign of gamma_{a,n} coincides with the Jacobi symbol (a/n) if n=1 mod 4, and 1 if n=3 mod 4.

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