let z1, z2 be Element of F_Complex; :: thesis: ( z2 <> 0. F_Complex implies (z1 / z2) *' = (z1 *') / (z2 *') )
reconsider z19 = z1, z29 = z2 as Element of COMPLEX by Def1;
assume A1: z2 <> 0. F_Complex ; :: thesis: (z1 / z2) *' = (z1 *') / (z2 *')
then A2: z2 *' <> 0. F_Complex by Th48;
z19 / z29 = z1 / z2 by A1, Th6;
hence (z1 / z2) *' = (z19 *') / (z29 *') by COMPLEX1:37
.= (z1 *') / (z2 *') by A2, Th6 ;
:: thesis: verum