The compositional inverses of three classes of permutation polynomials over finite fields

Published 27 Sep 2024 in math.NT | (2409.18517v1)

Abstract: R. Gupta, P. Gahlyan and R.K. Sharma presented three classes of permutation trinomials over $\mathbb{F}_{q^3}$ in Finite Fields and Their Applications. In this paper, we employ the local method to prove that those polynomials are indeed permutation polynomials and provide their compositional inverses.

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