TY - JOUR AU - Díaz Sánchez, Raquel AU - Ushijima, Akira PY - 2009 SN - 0146-4124 UR - https://hdl.handle.net/20.500.14352/50026 T2 - Topology Proceedings AB - In this paper we give necessary and sufficient conditions on three orientation-preserving hyperbolic isometries T1,T2,T3 so that for any point x ∈ H2 the orthogonal bisectors of the three segments with endpoints x, Ti(x) intersect. This is equivalent... LA - eng M2 - 81 PB - Auburn University KW - Fuchsian groups and automorphic functions KW - Moduli of Riemann surfaces KW - Teichmüller theory TI - On the properness of some algebraic equations appearing in Fuchsian Groups TY - journal article VL - 33 ER -