On Constructing Two Classes of Permutation Polynomials over Finite Fields
CHENG KaiminSchool of Mathematics and Information, China West Normal University, Nanchong 610037, Sichuan, China
In this paper, we construct two classes of permutation polynomials over finite fields. First, by one well-known lemma of Zieve, we characterize one class permutation polynomials of the finite field, which generalizes the result of Marcos. Second, by using the onto property of functions related to the elementary symmetric polynomial in multivariable and the general trace function, we con-struct another class permutation polynomials of the finite field. This extends the results of Marcos, Zieve, Qin and Hong to the more general cases. Particularly, the latter result gives a rather more general answer to an open problem raised by Zieve in 2010.
Key words:permutation polynomial; elementary symmetric polynomial; finite field; trace function
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