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math.GR2010★ 5 cited
On subgroup conjugacy separability in the class of virtually free groups
Oleg Bogopolski, Fritz Grunewald
A group G is called subgroup conjugacy separable (abbreviated as SCS), if any two finitely generated and non-conjugate subgroups of G remain non-conjugate in some finite quotient o…
math.GR2010
Abstract commensurators of solvable Baumslag - Solitar groups
Oleg Bogopolski
We prove that for any natural n>1, the abstract commensurator group of the Baumslag - Solitar group BS(1,n) is isomorphic to the group of 2 by 2 upper triangular matrices A over ra…