01250nam--2200397---450-9900005565302033163-7643-5390-20055653USA010055653(ALEPH)000055653USA01005565320010710d1996----km-y0itay0103----baengDE||||||||001yyOn spectral theory of elliptic operatorsYuri Egorov, Vladimir KondratievBaselBirkhäuserc1996X, 328 p.24 cmOperator theory advances and applications892001Operator theory advances and applications89Teoria spettraleEquazioni differenziali di tipo ellitticoEquazioni differenzialiAutovalori515.7248EGROV,Yruriv546469KONDRATIEV,Vladimir61909ITsalbcISBD990000556530203316515.7248 EGO10747 ING515.724BKTECPATTY9020010710USA01161720020403USA011705PATRY9020040406USA011639On spectral theory of elliptic operators884479UNISA