# Category Book

## Combinatorial algebra:syntax and semantics

I added a section about amenability (5.8), corrected many misprints. Here is the latest version of the book.

## Road maps

One of the features of my book, “Non-commutative combinatorial algebra” is a road map of Olshanskii’s proof of the celebrated Novikov-Adian’s theorem: for every large enough odd there exists a finitely generated infinite group of exponent $n$. The goal was to present the main ideas and the main methods of the proof without getting too […]

## Combinatorial algebra

The first complete version of my book “Combinatorial algebra:syntax and semantics” is here.