# Complex Analysis Topics

## 1. The Field of Complex Numbers

###### 1.1. Basic Properties of Complex Numbers

**1.1.1. The Arithmetic of Complex Numbers:**

- The Set of Complex Numbers
- Addition and Multiplication of Complex Numbers
- Addition and Multiplication of Complex Numbers Examples 1
- Division of Complex Numbers
- Division of Complex Numbers Examples 1
- The Set of Complex Numbers is a Field
- The Set of Complex Numbers is a Field Examples 1

**1.1.2. The Conjugate, Absolute Value, and Square Roots of a Complex Number**

- The Conjugate of a Complex Number
- The Absolute Value/Modulus of a Complex Number
- Square Roots of Complex Numbers
- Basic Properties of Complex Numbers Review

**1.1.3. The Polar Representation of a Complex Number**

- The Polar Representation of a Complex Number
- Polar Representation with Multiplication of Complex Numbers

**1.1.4. De Moivre's Theorem and nth Roots of Complex Numbers**

- De Moivre's Formula for the Polar Representation of Powers of Complex Numbers
- De Moivre's Formula Examples 1
- nth Roots of Complex Numbers
- nth Roots of Complex Numbers Examples 1
- nth Roots of Unity
- Polar Representation of Complex Number Review

###### 1.2. Topological Properties of the Complex Numbers

**1.2.1. Sequences of Complex Numbers**

- Sequences of Complex Numbers
- Properties of Convergent Sequences of Complex Numbers
- A Sequence of Complex Numbers Converges IFF The Real Part Sequence and Imaginary Part Sequence Converges
- Bounded Sequences of Complex Numbers

**1.2.2. Cauchy Sequences of Complex Numbers**

- Cauchy Sequences of Complex Numbers
- Convergence Criterion for Cauchy Sequences of Complex Numbers
- A Sequence of Complex Numbers is Cauchy IFF The Real Part Sequence and Imaginary Part Sequence are Cauchy
- The Completeness of the Field of Complex Numbers

**1.2.3. Open and Closed Sets in C**

- Open Sets in the Complex Plane
- Closed Sets in the Complex Plane
- The Interior of a Set of Complex Numbers
- The Closure of a Set of Complex Numbers

**1.2.4. Limits and Continuity of Complex-Valued Functions on C**

- Limits of Complex Functions
- Continuity of Complex Functions
- Open and Closed Set Criterion for the Continuity of Complex Functions

**1.2.5. Connected Sets and Compact Sets in C**

###### 1.3. Elementary Complex Functions

**1.3.1. The Complex Exponential Function**

- Complex Functions
- The Complex Exponential Function
- The Complex Exponential Function Examples 1
- Properties of the Complex Exponential Function
- The Graph of the Complex Exponential Function

**1.3.2. The Complex Cosine and Sine Functions**

**1.3.3. The Complex Natural Logarithm Functions**

- The Complex Natural Logarithm Function
- The Complex Natural Logarithm Function Examples 1
- Properties of the Complex Natural Logarithm Function

**1.3.4. The Complex Power Functions**

## 2. Complex Differentiability and Analytic/Holomorphic Complex Functions

###### 2.1. Complex Differentiable Functions

**2.1.1. Complex Differentiability**

- Complex Differentiable Functions
- Complex Differentiability of Sums, Differences, Products, and Quotients of Complex Differentiable Functions

###### 2.2. Analytic/Holomorphic Complex Functions

**2.1.2. Analytic/Holomorphic Functions**

- Analytic/Holomorphic Complex Functions
- Analytic/Holomorphic Complex Functions Examples 1
- Examples 1
- Analyticity of Sums, Differences, Products, and Quotients of Analytic Functions
- Analyticity of Polynomial and Rational Complex Functions
- Analyticity of Compositions of Analytic Functions

###### 2.3. The Cauchy-Riemann Theorem

**2.3.1. The Cauchy-Riemann Theorem**

- The Cauchy-Riemann Theorem
- The Cauchy-Riemann Theorem Examples 1
- The Cauchy-Riemann Theorem Examples 2

**2.3.2. Analyticity of the Complex Exponential, Logarithmic, Sine, and Cosine Functions**

- The Derivatives of the Complex Exponential and Logarithmic Functions
- The Derivatives of the Complex Sine and Cosine Functions

###### 2.4. Harmonic Functions

**2.4.1. Harmonic Functions

## 3. Curve Integrals of Complex Functions and Cauchy's Theorem

##### 5.1. The Fundamental Theorem of Calculus

- Piecewise Smooth Curves in the Complex Plane
- Integrals of Complex Functions Along Piecewise Smooth Curves ( Examples 1 | Examples 2 )
- Properties of Integrals of Complex Functions Along Piecewise Smooth Curves
- The Arc Length of a Piecewise Smooth Curve
- The Fundamental Theorem of Calculus for Integrals of Complex Functions Along Piecewise Smooth Curves

##### 5.2. Cauchy's Integral Theorems

## 6. Complex Series

##### 6.1. Series of Complex Numbers and Complex Functions

- Sequences and Series of Complex Numbers
- Sequences and Series of Complex Functions
- Convergence Tests for Series of Positive Real Numbers
- Complex Power Series
- The Radius of Convergence for Complex Power Series

##### 6.2. Taylor Series of Analytic Complex Functions

- Taylor Series of Analytic Complex Functions
- Taylor's Theorem for Analytic Complex Functions
- Table of Common Complex Taylor Series

- Orders of Roots of Analytic Complex Functions
- The Coincidence Principle
- Singularities of Analytic Complex Functions
- Criterion for Classifying Isolated Removable Singularities of Analytic Complex Functions
- Criterion for Classifying Isolated Pole Singularities of Analytic Complex Functions

##### 6.3. Laurent Series of Analytic Complex Functions

- Laurent Series of Analytic Complex Functions
- Laurent's Theorem for Analytic Complex Functions
- The Residue of an Analytic Function at a Point ( Examples 1 )
- The Residue of an Analytic Function at a Pole Singularity
- The Residue Theorem
- Evaluating Definite Integrals of Type 1
- Evaluating Definite Integrals of Type 2
- Evaluating Definite Integrals of Type 3
- The Principle of the Argument
- Rouche's Theorem

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