Recursions associated to trapezoid, symmetric and rotation symmetric functions over Galois fields, Francis N. Castro, Luis A. Medina, L. Brehsner Sepúlveda, et al. – Department of Mathematics
The concept of trapezoid Boolean function is also introduced and it is showed that the linear recurrences that exponential sums of trapezoid Boolean functions satisfy are the same as the ones satisfied by exponential sums of the corresponding rotations symmetric Boolean functions.