Kato,T <br/><br/>
Perturbation Theory for linear Operators/ 
by T.Kato 
 - 2nd ed. 
 - Heidelberg:  Springer-Verlag,  1976. 
 - xxi,619p. 
<br/><br/><label>ISBN: </label>3540075585 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Perturbation (Mathematics)	<br/>Linear operators	<br/>Differential equations, Partial	<br/>Mathematics	<br/>Mathematical optimization	<br/>Functional analysis	<br/>Calculus of variations	
<br/><br/><label>Dewey Class. No.: </label>515.7246	  / KAT/P