01111nam a2200337 i 450099100084727970753620020507174434.0930511s1989 de ||| | eng 3110117347b10765578-39ule_instLE01303232ExLDip.to Matematicaeng516.9AMS 15A24AMS 20H10AMS 51MAMS 51M10AMS 51M25LC QA685.F38Fenchel, Werner535235Elementary geometry in hyperbolic space /Werner FenchelBerlin ; New York :Walter de Gruyter,1989xi, 225 p. ;25 cmDe Gruyter studies in mathematics ;11Hyperbolic geometry.b1076557823-02-1728-06-02991000847279707536LE013 51M FEN11 (1989)12013000071466le013-E0.00-l- 04040.i1086121x28-06-02Elementary geometry in hyperbolic space923431UNISALENTOle01301-01-93ma -engde 01