Mathematical theory of Complex Calculus

Mathematical theory of Complex Calculus

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If you prefer, you can enroll directly on Thinkific (it is just the same as doing it on this website, but checkouts are quicker there and require you insert less data)


This course on Complex Calculus is structured as in the following:

  • the introduction focuses on the concept of complex functions;

  • the concept of derivative is extended to functions of a complex variable;

  • countour integration is discussed, and the following theorems are derived: Cauchy's integral theorem, Cauchy's integral formula;

  • the Laurent series is mathematically derived. Then, from Laurent, the Fourier and Taylor series are also derived;

  • residues are introduced and then used to do contour integration.

The prerequisites to the course are:

  • Single variable Calculus (especially derivatives and integrals);

  • Multivariable Calculus (especially line integrals and Stokes' theorem).

This course is based on the instructor's notes on Complex Calculus, and the presentation of the results is therefore original. The explanations are given by focusing on understanding and mathematically deriving the key concepts rather than learning the formulas and/or exercises by rote. The process of reasoning by using mathematics is the primary objective of the course, and not simply being able to do computations. 

Some of the results presented here also constitute the foundations of many branches of science. For example, the Laurent series and the Residue Theorem, as well as the Fourier series, are staples in Quantum Mechanics, Quantum Field Theory, and also in Engineering (in the Control theory of dynamical systems for instance).