00321nam a2200121Ia 4500082002000000100001800020245003900038260004800077300002000125490004400145500000500189700000500194  a515.35bD255.HK  aDavies, E. B.  aHeat kernels and spectral theoryb  aCambridgebCambridge University Pressc1989  aix, 197p. Index  aCambridge tracts in Mathematicsv v. 92  a  a