1．Algebraic Theory of Complex Numbers 1
1．Number Systems 1
2．The Algebraic Theory 5
2．Geometrical Representations 14
3．Roots of Unity 33
4．Elementary Functions of a Complex Variable 43
1．Introduction 43
2．Sequences 44
3．Series 47
4．Power Series 49
5．The Functions ez，cos z，sin z 52
6．The Logarithm 56
Answers to Exercises 60
Index 62