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# Mathematical Foundation Introduction

Mathematics can be broadly classified into two categories −

**Continuous Mathematics**− It is based upon continuous number line or the real numbers. It is characterized by the fact that between any two numbers, there are almost always an infinite set of numbers. For example, a function in continuous mathematics can be plotted in a smooth curve without breaks.**Discrete Mathematics**− It involves distinct values; i.e. between any two points, there are a countable number of points. For example, if we have a finite set of objects, the function can be defined as a list of ordered pairs having these objects, and can be presented as a complete list of those pairs.

## Topics in Discrete Mathematics

Though there cannot be a definite number of branches of Discrete Mathematics, the following topics are almost always covered in any study regarding this matter −

- Sets, Relations and Functions
- Mathematical Logic
- Group theory
- Counting Theory
- Probability
- Mathematical Induction and Recurrence Relations
- Graph Theory
- Trees
- Boolean Algebra

## Topics in Continuous Mathematics

Following are the important topics studied under continuous mathematics.

Real-Valued and Complex-Valued Functions

Power Series and Transcendental Functions

Expansions and Basis Functions

Orthogonality, Ortho-normality, Inner Products, and Completeness

Taylor Series

Continuity and Limits; Derivatives and Anti-Derivatives

Differential Equations

Signals and Systems

Linear Operators and Their Eigenfunctions

Fourier Analysis in Multiple Dimensions

The Quantized Degrees-of-Freedom in a Continuous Signal

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