*Here, you find my whole video series about Start Learning Sets in the correct order and I also help you with some text around the videos. If you have any questions, you can use the comments below and ask anything. However, without further ado let’s start:*

### Introduction

**Start Learning Sets** is a video series I started for everyone who is interested in the necessary foundations you need to enjoy the whole world of mathematics. At this point, you know a lot about the language of the mathematical logic such that we are ready to start with **set theory**:

### Let’s get started

So, sets don’t seem very complicated but you might not see yet how powerful they really are. All mathematics you ever know or will learn here with me can be formulated with sets. And that is the beauty of it: We only need set theory as the foundations of mathematics to construct the whole building on top! Okay, then let’s talk more about **sets**:

Operations we can do with sets include **unions**, **intersections**, and **set differences**:

For building new sets, the **Cartesian product** is very important:

Let’s talk about **maps**. There we can define the **preimage**, **image** and **range**:

For maps also the notions **injective** and **surjective** are very important. If we have both things, we speak of **bijective** maps:

Next important thing we can do with maps is the **composition** of two maps:

### Go to the next course

Start Learning Logic

Start Learning Sets

Start Learning Numbers

Start Learning Reals

Start Learning Complex