00998nam a22002655i 4500991002172649707536cr nn 008mamaa121227s1975 gw | s |||| 0|eng d9783540375111b14132606-39ule_instBibl. Dip.le Aggr. Matematica e Fisica - Sez. Matematicaeng51023Rockland, Charles58625Hypoellipticity and eigenvalue asymptotics[e-book] /by Charles RocklandBerlin :Springer,19751 online resource (iii, 174 p.)Lecture Notes in Mathematics,0075-8434 ;464MathematicsSpringer eBookshttp://dx.doi.org/10.1007/BFb0096096An electronic book accessible through the World Wide Web.b1413260603-03-2205-09-13991002172649707536Hypoellipticity and eigenvalue asymptotics80879UNISALENTOle01305-09-13m@ -enggw 00