Does anyone have a link to a comprehensive list of z transforms? Maybe it's just me, but I can't seem to invert transform equations of the type a(1 - z) / (z^2 - 2az + a) seperately or together. i.e. equations with a polynomial on the bottom with no real roots. EDIT: I think I am missing a property, I just can't put my finger on it. NOTE: This isn't homework, but isn't gamedev either.