When does a polynomial over a finite field permute the elements of the fields?
American Mathematical Monthly
Finite fields
Permutation Polynomials: A Matrix Analogue of Schur's Conjecture and a Survey of Recent Results
Finite Fields and Their Applications
Lenstra's Proof of the Carlitz-Wan Conjecture on Exceptional Polynomials: An Elementary Version
Finite Fields and Their Applications
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In Dickson (1896-1897) [2], the author listed all permutation polynomials up to degree 5 over an arbitrary finite field, and all permutation polynomials of degree 6 over finite fields of odd characteristic. The classification of degree 6 permutation polynomials over finite fields of characteristic 2 was left incomplete. In this paper we complete the classification of permutation polynomials of degree 6 over finite fields of characteristic 2. In addition, all permutation polynomials of degree 7 over finite fields of characteristic 2 are classified.