Complex analysis by ahlfors

Ahlfors. Page 15. COMPLEX ANALYSIS. Page 16. Page 17. 1 COMPLEX NUMBERS. 1. THE ALGEBRA OF COMPLEX NUMBERS. It is fundamental that real and complex numbers obey 

This text is a rigorous introduction on an elementary level to the theory of analytic functions of one complex variable. At American universities it is intended to be used by first-year graduate and advanced under- graduate students.