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Published online by Cambridge University Press: 11 January 2023
Let D be a division ring and N be a subnormal subgroup of the multiplicative group $D^*$. We show that if N contains a nonabelian solvable subgroup, then N contains a nonabelian free subgroup.
The first author is funded by Vietnam National University Ho Chi Minh City (VNUHCM) under grant number T2022-18-03.