Davies, E.B. <br/><br/>
Spectral theory and differential operators / 
E.B.Davies. 
 -  Cambridge University Press,  1996. 
 - Cambridge studies in advanced mathematics:  42 .
<br/><br/>Includes bibliography and index 
<br/><br/><label>ISBN: </label>0521587107 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Spectral theory (Mathematics)<br/>Elliptic operator
<br/><br/><label>LC Class. No.: </label>QA320  / Dav 1996