Faris, William G, b.1939 <br/><br/>
Self-adjoint operators / 
William G. Faris. 
 - Berlin:  Springer-Verlag,  1975. 
 - vi, 115 p;  25 cm 
 - Lecture notes in mathematics  433. .
<br/><br/>Bibliography: p.  109 -115. 
<br/><br/><label>ISBN: </label>0387070303  New York 3540070303  Berlin 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Selfadjoint operators.<br/>Perturbation (Mathematics).<br/>Quantum theory.