A simple coefficient test for cubic permutation polynomials over integer rings
Y.-L. Chen, Jonghoon Ryu, O.Y. Takeshita · IEEE Communications Letters · 2006
Permutation polynomials have been extensively studied but simple coefficient tests for permutation polynomials over integer rings are only known for limited cases. In this letter, a simple necessary and sufficient coefficient test is proven for cubic permutation polynomials over integer rings. A possible application is in the design of interleavers for turbo codes.