## About this course

Linear algebra is an area of mathematics which studies linear functions and linear equations. If this sounds too simple, notice that the arguments and values of linear functions can be not only numbers, but also vectors, and this leads to very beautiful structures which we are going to study in this course. Moreover, linear algebra allows to study some nonlinear objects, such as quadratic forms!

Linear algebra has applications in almost any field one can imagine: physics, computer science, chemistry, economics, engineering and many, many others. It is also deeply connected to the other areas of mathematics, such as calculus, probability, group theory, differential equations etc. Ultimately, linear algebra is very exciting on its own: it allows to use geometry when algebra gets very complicated, and vice versa!

What is the best way to study linear algebra? As many other areas of mathematics, linear algebra has some **building blocks**:

- key concepts,
- main results,
- common tricks;

The number of such building blocks is many times less than the number of pages in a typical textbook on linear algebra. At the same time, once you know these building blocks, you are ready to use linear algebra!

The goal of this course is to help you to **find and understand the building blocks of linear algebra**.
Moreover, it is important to **develop your personal vision and intuition about them**. This cannot be achieved by solving 1000 similar typical exam problems. In this course you will be provided with a sort of "

*minimal linear algebra kit*", so that you can manage the saved time yourself. In particular, you are encouraged to discuss the lessons here at stepic, to participate in competitions and other events at your campus, and to surf web resources such as math.stackexchange.com, mathoverflow.net, dxdy.ru (in Russian), arxiv.org and of course Wikipedia. If you are enrolled in a traditional course of linear algebra, you will benefit from this course too, since it is not designed to substitute the traditional courses.

The first lesson is available without registration here.

## Whom this course is for

High school graduates, first year students at universities, anyone who would like to improve his/her background in linear algebra.

## Initial requirements

Familiarity with the standard vectors (directed arrows) on the plane (or in the space); real, rational and complex numbers; how to solve systems of 2 linear equations with 2 unknowns; how to find roots of a polynomial, etc. Curiosity, ability to work independently, interest in competition level problems. Interest (and some background) in physics is a plus.