Evgeny Khukhro’s invited plenary talk at an international algebraic conference in Naples

Evgeny Khukhro gave an invited plenary talk at the international conference “Advances in Group Theory and Applications 2025“, June 23–28, 2025, Napoli (Italy). Evgeny’s reported on his solution of 30-year-old problem of B. Hartley about finite and locally finite groups containing an element with small centralizer.