Equation Icon  ^uB = KuB, (335 ) -- K = --------------1-+-ζζ--------------, (336 ) (aζ + b)(aζ + b) + (cζ + d)(cζ + d) aζ + b ^ζ = ------; ad − bc = 1. (337 ) cζ + d iλ cζ-+-d- e = cζ-+ d- (338 )