2 problems

Let $p\geq 5$ be a prime, and let $E_n(1,x)$ denote the reversed Dickson polynomial of the second kind. A complete permutation polynomial (CPP) is a polynomial $f$ such that both…

Let $p$ be an odd prime, let $1\leq n\leq p^2-1$, and let $D_n(1,x)$ be the reversed Dickson polynomial of the first kind. A polynomial $f$ is a complete permutation polynomial (CP…