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Let $F_q$ be the finite field with $q$ elements and $F_q[x_1,\ldots, x_n]$the ring of polynomials in $n$ variables over $F_q$. In this paper we considerpermutation polynomials and local permutation polynomials over $F_q[x_1,\ldots,x_n]$, which define interesting generalizations of permutations over finitefields. We are able to construct permutation polynomials in $F_q[x_1,\ldots,x_n]$ of maximum degree $n(q-1)-1$ and local permutation polynomials in$F_q[x_1,\ldots, x_n]$ of maximum degree $n(q-2)$ when $q>3$, extendingprevious results.

Permutation and local permutation polynomial of maximum degree