¡¡¡¡This unfortunate name£¬which seems to imply that there is something unreal about these numbers and that they only lead a precarious existence in some people\'s imagination£¬has contributed much toward making the whole subject of complex numbers suspect in the eyes of generations of high school students. ¡¡¡¡-Zeev Nehari on the use of the term imaginary number ¡¡¡¡In the centuries prior to the movement of the 1800s to ensure that mathematical analysis was on solid logical footing£¬complex numbers£¬those numbers algebraically generated by adding ¡Ì1 to the real field£¬were utilized with increasing frequency as an ever-growing number of mathematicians and physicists saw them as useful tools for solving problems of the time. The 19th century saw the birth of complex analysis£¬commonly referred to as function theory£¬as a field of study£¬and it has since grown into a beautiful and powerful subject.The functions referred to in the name \"function theory\" are primarily analytic functions£¬and a first course in complex analysis boils down to the study of the com-plex plane and the unique and often surprising properties of analytic functions. Fa-miliar concepts from calculus-the derivative£¬the integral£¬sequences and series-are ubiquitous in complex analysis£¬but their manifestations and interrelationships are novel in this setting.It is therefore possible£¬and arguably preferable£¬to see these topics addressed in a manner that helps stress these differences£¬rather than following the same ordering seen in calculus.
【目录】
Preface 1 The Complex Numbers 1£®1 Why? 1£®2 The Algebra of Complex Numbers 1£®3 The Geometry of the Complex Plane 1£®4 The Topology of the Complex Plane 1£®5 The Extended Complex Plane 1£®6 Complex Sequences 1£®7 Complex Series
2 Complex Functions and Mappings 2£®1 Continuous Functions 2£®2 Uniform Convergence 2£®3 Power Series 2£®4 Elementary Functions and Euler\'s Formula 2£®5 Continuous Functions as Mappings 2£®6 Linear Fractional Transformations 2£®7 Derivatives 2£®8 The Calculus of Real-Variable Functions 2£®9 Contour Integrals
3 Analytic Functions 3£®1 The Principle of Analyticity 3£®2 Differentiable Functions are Analytic 3£®3 Consequences of Goursat\'s Theorem 3£®4 The Zeros of Analytic Functions 3£®5 The Open Mapping Theorem and Maximum Principle 3£®6 The Cauchy-Riemann Equations 3£®7 Conformal Mapping and Local Univalence
4 Cauchy\'s Integral Theory 4£®1 The Index of a Closed Contour 4£®2 The Cauchy Integral Formula 4£®3 Cauchy\'s Theorem
5 The Residue Theorem 5£®1 Laurent Series 5£®2 Classification of Singularities 5£®3 Residues 5£®4 Evaluation of Real Integrals 5£®5 The Laplace Transform
6 Harmonic Functions and Fourier Series 6£®1 Harmonic Functions 6£®2 The Poisson Integral Formula 6£®3 Further Connections to Analytic Functions 6£®4 Fourier Series
Epilogue A Sets and Functions B Topics from Advanced Calculus References Index ±à¼ÊÖ¼Ç
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