Gregory, John, b.1938  <br/><br/>
Quadratic form theory and differential equations / 
John Gregory. 
 - New York:  Academic Press,  1980. 
 - 237p.;   24cm 
 - Mathematics in science and engineering  0076-5392. .
<br/><br/> Includes index. 
<br/><br/>Bibliography: p.231-233. 
<br/><br/><label>ISBN: </label>0123014506 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Forms, Quadratic.<br/>Differential equations, Partial.<br/>Calculus of variations.