Abstract
Abstract We show, using acylindrical hyperbolicity, that a finitely generated group splitting over ℤ ${\mathbb{Z}}$ cannot be simple. We also obtain SQ-universality in most cases, for instance a balanced group (one where if two powers of an infinite order element are conjugate then they are equal or inverse) which is finitely generated and splits over ℤ ${\mathbb{Z}}$ must either be SQ-universal or it is one of exactly seven virtually abelian exceptions.
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