Subgroup Separability of Generalized Free Products of Free-By-Finite Groups
R. B. J. T. Allenby, C. Y. Tang · Canadian Mathematical Bulletin · 1993
Abstract We prove that generalized free products of finitely generated free-byfinite groups amalgamating a cyclic subgroup are subgroup separable. From this it follows that if where t ≥ 1 and u, v are words on {a1,...,am} and {b1,...,bn} respectively then G is subgroup separable thus generalizing a result in [9] that such groups have solvable word problems.