A discreteness algorithm for 4-punctured sphere groups
A discreteness algorithm for 4-punctured sphere groups
Let Γ be a subgroup of PSL(2, R) generated by three parabolic transformations.The main goal of this paper is to present an algorithm to determine whether or not Γ is discrete.Historically discreteness algorithms have been considered within several broader mathematical paradigms: the discreteness problem, the construction and deformation of hyperbolic …