Pride's folk conjecture on one-relator groups with torsion

A one-relator group with torsion is a group with a presentation $G=\langle X;R^n\rangle$, where $R$ is not a proper power and $n>1$. Pride's folk conjecture. Apart from the complications introduced by having elements of finite order, one-relator groups with torsion should behave much like free groups. The paper formalises this claim using JSJ-decompositions and proves a slightly weaker version, reflecting the close analogy between one-relator groups with torsion and torsion-free hyperbolic groups.