Abstract
For a fixed integer n >= 2, we show that a permutation of the least residues mod p of the form f(x) = Ax(k) mod p cannot map a residue class mod n to just one residue class mod n once p is sufficiently large, other than the maps f(x) = +/- x mod p when n is even and f(x) = +/- x or +/- x((p+1)/2) mod p when n is odd.