Davies, Edward Brian <br/><br/>
Spectral theory and differential operators / 
E.B.Davies 
 - Cambridge :  Cambridge University Press,  1996 
 - ix, 182 p. :  ill.  23 cm 
<br/><br/>Includes bibliographical references and index. 
<br/><br/><label>ISBN: </label>0521587107(pbk.) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Spectral theory (Mathematics)<br/>Elliptic operators
<br/><br/><label>Dewey Class. No.: </label>515.7242