01196nam a2200337 i 450099100098860970753620020507181159.0970704s1975 de ||| | eng 354007175Xb10785553-39ule_instLE01305352ExLDip.to Matematicaeng515.353AMS 35P99Rockland, Charles58625Hypoellipticity and eigenvalue asymptotics /Charles RocklandBerlin ; New York :Springer-Verlag,1975171 p. ;25 cmLecture notes in mathematics,0075-8434 ;464Bibliography: p. [168]-171Asymptotic expansionsEigenvaluesHypoelliptic differential equationsPartial differential equationsSpectral theory.b1078555323-02-1728-06-02991000988609707536LE013 35P ROC11 (1975)12013000088464le013-E0.00-l- 00000.i1088568728-06-02Hypoellipticity and eigenvalue asymptotics80879UNISALENTOle01301-01-97ma -engde 01