2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/131213We prove that the Fourier matrices for the imprimitive complex reflection groups introduced by Malle define fusion algebras with not necessarily positive but integer structure constants. Hence they define Z-algebras. As a result, we obtain that all known Fourier matrices belonging to spetses define algebras with integer structure constants.14 pagesRepresentation Theory20F55; 20C33text