# Mathematics

Learn the arts of numbers, logical definitions, and constructed abstract structures, as well as their relationships to each other, which will help you better master physics.
Video
Level 3 (with higher mathematics)

## Kronecker delta explained simply in 11 minutes!

In this video you will learn the Kronecker delta within 10 minutes and how you can use it to write down the scalar product in index notation.

Content of the video
1. [00:00] Hello there!
2. [00:42] Definition and Examples
3. [01:52] Einstein's Summation convention
4. [02:49] 4 Rules for Kronecker delta
5. [06:38] Scalar product with Kronecker delta
Lesson
Level 3 (with higher mathematics)

## Kronecker Delta: 4 Important Rules and Scalar Product in Index Notation

Here you learn everything about Kronecker-Delta! Including 4 calculation rules with Einstein's summation convention, typical mistakes and more.

Course
Level 3 (with higher mathematics)

## Mathematics for physics enthusiasts II

Here you will learn the basics of multidimensional differentiation and integration as well as how to deal with differential equations. These are important tools in physics.

Formula

Formula