@article{42791,
  abstract     = {{We describe a practical algorithm to solve the constructive membership problem for discrete two-generator subgroups of SL₂(R) or PSL₂(R). This algorithm has been implemented in Magma for groups defined over real algebraic number fields.}},
  author       = {{Kirschmer, Markus and Rüther, Marion G.}},
  issn         = {{0021-8693}},
  journal      = {{Journal of Algebra}},
  keywords     = {{Algebra and Number Theory}},
  pages        = {{519--548}},
  publisher    = {{Elsevier BV}},
  title        = {{{The constructive membership problem for discrete two-generator subgroups of SL(2,R)}}},
  doi          = {{10.1016/j.jalgebra.2017.02.029}},
  volume       = {{480}},
  year         = {{2017}},
}