Gustafson, Karl E. <br/><br/>
Introduction to partial differential equations and Hilbert space methods.- 3rd ed. / 
Karl E. Gustafson. 
 - 3rd ed., rev. 
 - Mineola, N.Y. :  Dover Publications,  1999. 
 - xv, 448 p. :  ill. ; 
<br/><br/> Includes indexes. 
<br/><br/><label>ISBN: </label>0486612716 (pbk.) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Differential equations, Partial.<br/>Hilbert space.
<br/><br/><label>Universal Decimal Class. No.: </label>517.95  / GUS