*Here, you find my short advent calender about mathematical symbols. Each video introduces a symbol that one uses in mathematics. You can also download the pdf versions of the videos here.*

### Introduction

The first video is about the **Kronecker Delta**:

### Let’s get started

Let’s continue with the related **Levi-Civita Symbol**.

The next symbol is called **Nabla**.

And now the **Factorial**:

The **Gamma Function** is a generalisation of the last video:

For the **Composition** we use a special symbol:

The capital sigma we use to denote the **Sum Symbol**:

And the capital Pi is used for the **Product Symbol**:

Do you know the symbol for the **Restriction** of a function?

Some matrices you see in physics a lot: **Pauli matrices**.

Naturally a fundamental notation: **Set Brackets**.

The **Big O** notation is used in a lot of formulas.

Next, we look a the **Binomial Coefficient**

The **Modulo** notation is important when you work with numbers.

The next video is about the **Beta Function**.

Also a fundamental notation is given by the **Map arrows**.

For some formulas the **Little o** notation is helpful.

Next, let’s discuss the **Outer product**.

Are you interested in **Euler’s Phi Function**

The **Laplace Operator** a very important object in differential equations.

Next symbol ist about the **Convolution**

Do you know the **Heaviside Function**

Let us talk about **Quaternions**.

And finally the last video in this series is about **Infinity**.