00847nam0-22003011i-450-99000059186040332120001010000059186FED01000059186(Aleph)000059186FED0100005918620001010d--------km-y0itay50------baitay-------001yySPECTRA OF PAR PARTIAL DIFFERENTIAL OPERATORSSCHECHTER M.s.l.s.e.s.d.Teoria delle delle StruttureScienza delle CostruzioniCalcolo a RotturaSchechter,Martin13643ITUNINARICAUNIMARCBK99000059186040332107 A-423 CNR4356DINSCDINSCSPECTRA OF PAR PARTIAL DIFFERENTIAL OPERATORS318431UNINAING01