Abstract
We provide some new families of permutation polynomials of \({\mathbb {F}}_{q^{2n}}\) of the type \(x^rg(x^{s})\), where the integers r, s and the polynomial \(g \in {\mathbb {F}}_q[x]\) satisfy particular restrictions. Some generalizations of known permutation binomials and trinomials that involve a sort of symmetric polynomials are given. Other constructions are based on the study of algebraic curves associated to certain polynomials. In particular we generalize families of permutation polynomials constructed by Gupta–Sharma, Li–Helleseth, Li–Qu–Li–Fu.
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Acknowledgements
The first author was partially supported by the Italian Ministero dell’Istruzione, dell’Università e della Ricerca (MIUR) and by the Gruppo Nazionale per le Strutture Algebriche, Geometriche e le loro Applicazioni (GNSAGA-INdAM). The second author was supported by CNPq, PDE Grant number 200434/2015-2. This work was done while the author enjoyed a sabbatical at the Università degli Studi di Perugia leave from Universidade Federal do Rio de Janeiro. We would like to thank the referees for providing us with useful comments which served to improve the paper.
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Bartoli, D., Quoos, L. Permutation polynomials of the type \(x^rg(x^{s})\) over \({\mathbb {F}}_{q^{2n}}\) . Des. Codes Cryptogr. 86, 1589–1599 (2018). https://doi.org/10.1007/s10623-017-0415-8
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DOI: https://doi.org/10.1007/s10623-017-0415-8