Geometry

### The Hidden Life of Circles

Everyone knows that circles are quite simple figures, but from the perspective of number theory they have many secrets inside.

Geometry

Everyone knows that circles are quite simple figures, but from the perspective of number theory they have many secrets inside.

Group Theory

We can find invariants in many branches of mathematics. Let us try to use the theory of invariants to solve a few popular brainteasers.

Modular Arithmetic

Mathematics has a lot of hidden gems. Today I will try to give us a glimpse to one of the vast domain — modular arithmetics.

Analysis

I never thought that I would write math stories in English, but I also never thought that I would live in the UK either.