01105nam0-22003731i-450-9900013612404033210-8176-3958-6000136124FED01000136124(Aleph)000136124FED0100013612420000920d1997----km-y0itay50------baengGeometrical optics and related topicsFerruccio Colombini, Nicolas Lerner, editorsBoston [MA]Birkhauser1997vi, 361 p.25 cmProgress in nonlinear differential equations and their applications32Urti e singolaritaEquazioni e sistemi non lineari del secondo ordineSpazi di sobolev535 dc.21Colombini,FerruccioLerner,NicolasITUNINARICAUNIMARCBK990001361240403321C-17-(3215583MA1MA135L6735L7046E35Geometrical optics and related topics375379UNINAING01