Rellich, Franz <br/><br/>
Perturbation theory of eigenvalue problems;  lectures delivered fall 1953/ 
Notes prepared with the assistance of J. Berkowitz. 
 - [New York]:  Institute of Mathematical Sciences,  [1953?]. 
 - 164 L.: 
<br/><br/>Includes bibliography. 
<br/><br/><br/>Photocopy. <br/>Ann Arbor, Mich., <br/>University Microfilms, <br/>1965. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Functional analysis.<br/>Perturbation (Mathematics)<br/>Eigenvalues.
<br/><br/><label>Dewey Class. No.: </label>515.35  / R383p