Friedrichs, Kurt Otto,  1901- <br/><br/>
Spectral theory of operators in Hilbert space / 
K. O. Friedrichs. 
 - New York :  Springer-Verlag,  1973. 
 - viii, 244 p. ;  26 cm. 
 - Applied Mathematical Sciences / Eds.: Fritz John ... et al  Vol. 9 .
 - Applied Mathematical Sciences (Springer-Verlag New York Inc.) ;  Vol. 9. .
<br/><br/>Bibliogr.: p. 241. 
<br/><br/><label>ISBN: </label>0387900764 3540900764 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Hilbert space<br/>Spectral theory (Mathematics)<br/>Operator theory