December 2023 update of the “Kourovka Notebook”

An update for the current 20th edition of “Kourovka Notebook (Unsolved Problems in Group Theory)” is  posted. A few new solutions and new references appear, both for problems from the latest section and from the previous ones. (But of course many problems remain very much open:-).)

Recall that “Kourovka Notebook” is a famous collection of open problems in group theory proposed by hundreds of mathematicians from all over the world, published every 2-4 years since 1965.