Permutation binomials over finite fields
Permutation binomials over finite fields
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DOI:
10.1090/s0002-9947-09-04578-4
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发表时间:
2007-07
影响因子:
1.3
通讯作者:
Ariane M. Masuda;Michael E. Zieve
中科院分区:
文献类型:
--
作者:
Ariane M. Masuda;Michael E. Zieve
We prove that if x m + ax n permutes the prime field F p , where m > n > 0 and a ∈ F * p , then gcd(m - n,p ― 1) > √/p ― 1. Conversely, we prove that if q > 4 and m > n > 0 are fixed and satisfy gcd(m - n, q ― 1) > 2q(log log q)/ log q, then there exist permutation binomials over F q of the form x m + ax n if and only if gcd(m, n, q - 1) = 1.