Two types of permutation polynomials with special forms
(1805.10926)Abstract
Let $q$ be a power of a prime and $\mathbb{F}q$ be a finite field with $q$ elements. In this paper, we propose four families of infinite classes of permutation trinomials having the form $cx-xs + x{qs}$ over $\mathbb{F}{q2}$, and investigate the relationship between this type of permutation polynomials with that of the form $(xq-x+\delta)s+cx$. Based on this relation, many classes of permutation trinomials having the form $(xq-x+\delta)s+cx$ without restriction on $\delta$ over $\mathbb{F}_{q2}$ are derived from known permutation trinomials having the form $cx-xs + x{qs}$.
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