Hellwig, Gunter,  1926- <br/><br/>
Differential operators of mathematical physics / 
Gunter Hellwig ; translated from the German by Birgitta Hellwig 
 - Reading, Mass. :  Addison-Wesley,  1967 
 - vii, 296 p. ;  23 cm. 
 - Addison-Wesley series in mathematics .
<br/><br/>Includes bibliographical references (p. 289-293) and index 
<br/><br/>
<br/><br/><br/>engger 
<br/><br/><label>LCCN: </label>67-014209 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Differential equations, Partial<br/>Hilbert space<br/>Mathematical physics