The new 20-th edition of Kourovka Notebook

The latest 20-th edition of Kourovka Notebook (Unsolved Problems in Group Theory), Novosibirsk, 2022, has just appeared:

Unsolved Problems in Group Theory. The Kourovka Notebook. No. 20. (See a newer version in a later post.)

This 20-th issue contains 126 new problems and a number of comments on  problems from the previous issues. The section “Archive of Solved Problems” includes all the solved problems from the previous issues that have already been commented on in previous issues, while new solutions are found among unsolved problems in the corresponding sections.

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