Mô tả

Complex Calculus is an essential course that provides students with a foundation in complex functions, derivatives of complex variables, contour integration, Laurent series, Fourier series, and residues. In this course, you will learn the key concepts of Complex Calculus, and the process of reasoning by using mathematics, rather than rote memorization of formulas and exercises. Here's what you need to know about this course:


  1. Introduction to Complex Functions: The course begins by focusing on the concept of complex functions.

  2. Derivatives of Complex Variables: Next, the concept of derivative is extended to functions of a complex variable.

  3. Contour Integration: You will learn about contour integration, and the following theorems will be derived: Cauchy's integral theorem and Cauchy's integral formula.

  4. Laurent Series: The Laurent series will be mathematically derived. From Laurent, the Fourier and Taylor series are also derived.

  5. Residues: You will be introduced to residues and how to use them to do contour integration.

  6. Prerequisites: To take this course, you should have completed single variable Calculus, especially derivatives and integrals, and multivariable Calculus, especially line integrals and Stokes' theorem.

  7. Original Material: This course is based on the instructor's notes on Complex Calculus, and the presentation of the results is therefore original.

  8. Focusing on Understanding: The explanations are given by focusing on understanding and mathematically deriving the key concepts, rather than learning formulas and exercises by rote.

  9. Benefits: Some of the results presented in this course constitute the foundations of many branches of science, including Quantum Mechanics, Quantum Field Theory, and Engineering (in the Control theory of dynamical systems, for instance). By mastering the contents of this course, you will be able to tackle the most interesting mathematical and engineering problems.

  10. Who this course is for: This course is suitable for anyone interested in expanding their knowledge of mathematics, including students of mathematics, physics, engineering, and related fields, as well as professionals who wish to develop their understanding of Complex Calculus.


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7 sections

Introduction to complex functions and derivatives of complex functions

3 lectures
functions of a complex variable part 1
08:55
functions of a complex variable part 2
20:20
Concept of derivative in complex calculus
19:53

Integration in Complex Calculus

4 lectures
integrals of complex functions and Cauchy theorem
19:01
Extension of Cauchy theorem
19:22
Cauchy integral formula part 1
21:07
Cauchy integral formula part 2
09:18

Laurent Series, Fourier Series, Taylor Series

5 lectures
Laurent series
26:03
Laurent series in compact form
08:29
Fourier series derivation from Laurent series
14:56
Fourier series generalization to any period T
05:13
Taylor series derivation from Laurent series
06:13

Residues and Contour Integration

15 lectures
Concept of Residue
07:03
Residue Theorem
10:39
Calculation of residues and coefficients of the Laurent series
22:56
Evaluation of a real integral using complex integration (exercise 1)
25:19
Contour integration to evaluate a real integral (exercise 2)
30:54
Contour integration to evaluate a real integral (exercise 3)
25:14
Another integral evaluated using the results of Complex Calculus (exercise 4)
07:36
Contour integration to evaluate a complex integral (exercise 5)
27:02
Another contour integration of a real integral - Exercise 6
15:36
Fresnel integral over the real line (formally derived with the residue theorem)
14:19
Hilbert transform and its geometric meaning
15:42
Solution to the diffusion equation using complex calculus and Laplace transform
13:26
Representation of the Dirac Delta
32:11
Abel-Plana formula in complex Calculus
17:34
Convolution of sinc functions using complex calculus
27:06

How residues aid in the interpretation of the Fourier Transform and its inverse

2 lectures
The importance of the Dirac Delta in defining the Inverse Fourier Transform
16:17
Another integral representation of the Dirac Delta
17:27

How to use complex calculus to attribute meaning to divergent series

8 lectures
Complex calculus to evaluate divergent series
39:09
Introduction to the analytic continuation of the Riemann zeta function
02:27
Train of impulses expanded in a Fourier series
08:42
Poisson summation formula
04:48
Application of Poisson summation formula
06:55
Another representation of the Riemann zeta function
05:15
Functional equation of the Riemann zeta function
13:53
Evaluation of the Riemann zeta function at s=-3
07:17

Some relevant properties of the Riemann Zeta function

8 lectures
Contour integral related to the Euler reflection formula
16:09
Derivation of Euler reflection formula
05:44
Lagrange duplication formula
06:48
Relation between the Beta function and the Gamma function
05:49
Another form of the Riemann functional equation
08:53
Derivative of the Riemann Zeta function at s=0
16:53
Derivative of the Gamma function near the point s=1
05:55
Representations of the Euler Mascheroni constant
07:13

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