RT Journal Article T1 On the properness of some algebraic equations appearing in Fuchsian Groups A1 Díaz Sánchez, Raquel A1 Ushijima, Akira 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 to proving the properness of certain algebraic sets. As a corollary, we give a new proof for the existence and density of generic fundamental polygons for cocompact Fuchsian groups. PB Auburn University SN 0146-4124 YR 2009 FD 2009 LK https://hdl.handle.net/20.500.14352/50026 UL https://hdl.handle.net/20.500.14352/50026 LA eng DS Docta Complutense RD 6 abr 2025