Wave equations classification and characteristics elliptics and parabolic equations 

 -  1973 
 - p.  cm. 
<br/><br/><label>Standard No.: </label>22848 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Partial differential equations
<br/><br/><label>Dewey Class. No.: </label>B334, L3.1/.2/.3