TY  - BOOK
AU  - Kato,Tosio
TI  - Perturbation theory for linear operators
U1  - 517.7 
PY  - 1966///
CY  - Berlin
PB  - Springer
KW  - Linear operators
KW  - Perturbation (Mathematics)
KW  - Functional analysis
KW  - Symmetric operators
N1  - Includes index; Bibliography: p. 566-577
ER  -