Katĺo, Tosio <br/><br/>
Perturbation theory for linear operators 
Tosio Kato 
 - Berlin  Springer  c1995 
 - xxi, 619 p  24 cm 
 - Classics in mathematics .
<br/><br/> "Reprint of the 1980 edition."  Originally published: 2nd ed. Berlin ; New York : Springer-Verlag, 1976 (1980 printing). (Grundlehren der mathematischen Wissenschaften in Einzeldarstellungen mit besonderer Berčucksichtigung der Anwendungsgebiete ; Bd. 132) 
<br/><br/><label>ISBN: </label>354058661X (acid-free) 
<br/><br/><label>LCCN: </label>94039131 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Linear operators<br/>Perturbation (Mathematics)
<br/><br/><label>Dewey Class. No.: </label>515/.7246