June 2022 update for the 20th edition

An update for the current 20th edition of “Kourovka Notebook (Unsolved Problems in Group Theory)” is  posted.  A separate file contains the updates onlyAll the changes are also incorporated in the new version of the main PDF file Unsolved Problems in Group Theory. The Kourovka Notebook. No. 20.

Further comments/solutions are welcome!

Evgeny Khukhro   khukhro@yahoo.co.uk  and
Victor Mazurov  mazurov@math.nsc.ru
Editors
************************************

This 20th edition contains 126 new problems and a number of comments on about 1000 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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