RT Book, Section T1 Representing 3-manifolds by Dehn spheres A1 Montesinos Amilibia, José María A2 Lafuente López, Javier A2 Pozo Coronado, Luis Miguel AB Let M be a closed orientable 3-manifold. A Dehn sphere S is a 2-sphere immersed in M with only double curve and triple point singularities. S fills M if S defines a cell decomposition of M. It is proven that every closed orientable 3-manifold has a filling Dehn sphere. Examples are given, and Johansson diagrams are proposed as a method for representing all closed orientable 3-manifolds. PB Editorial Complutense SN 84-7491-581-3 YR 2000 FD 2000 LK https://hdl.handle.net/20.500.14352/60752 UL https://hdl.handle.net/20.500.14352/60752 LA eng DS Docta Complutense RD 20 ene 2026