timesMinusI(const RComplex<T>& s1)
timesMinusI(const RScalar<T>& s1)
timesMinusI(const RComplex<T>& s1){  typedef typename UnaryReturn<RComplex<T>, FnTimesMinusI>::Type_t  Ret_t;  return Ret_t(s1.imag(),	       -s1.real());}