2 papers
math.HO2019
Elements of mathematics in problems. Through olympiads and circles to profession
M. Berstein, A. Blinkov, V. Bragin +14
This is a collection of teaching materials used in several Russian universities, schools, and mathematical circles. Most problems are chosen in such a way that in the course of the…
math.GR2011
When Any Group of N Elements is Cyclic?
V. Bragin, Ant. Klyachko, A. Skopenkov
We give a simple proof of the well-known fact: any group of n elements is cyclic if and only if n and ϕ(n) are coprime. This note is accessible for students familiar with permutati…