3-dimensional Lorentz space-forms and Seifert fiber spaces

Abstract

Table of Contents 1. Introduction 231 2. Special features of the 3-dimensional Lorentz geometry of constant curvature 1 235 3. Subgroups of PSL 2 (R) and PSL 2 (R) 239 4. Subgroups of /oSbo), the level of a subgroup 243 5. Properly discontinuous subgroups of / 0 (^i) 245 6. Space-forms with solvable fundamental groups 247 7. Finiteness of Level 248 8. Standard Lorentz orbifolds and Seifert orbifolds 252 9. Topology of standard orbifolds 258 10. Homogeneous space-forms 264 11.