Some new GP features zetamultdual The function zetamultdual(s) returns the dual sequence of s. ? v = [3,5,2,2]; ? vd = zetamultdual(v) %54 = Vecsmall([2,2,2,1,1,1,2,1]) ? zetamultdual(vd) %55 = Vecsmall([3,5,2,2]) ? zetamult(v) %56 = 5.4280607575206868132850520365445624522E-5 ? zetamult(vd) %57 = 5.4280607575206868132850520365445624522E-5