TY  - BOOK
AU  - Gustafson Karl E
AU  - Rao Duggirala K M
TI  - Numerical range: the field of values of linear operators and matrices
SN  - 0-387-94835-X
U1  - 515.7246 
PY  - 1997///
CY  - New York
PB  - Springer-Verlag
KW  - Functional analysis
KW  - Linear operators
KW  - Numerical range
N1  - 9 figures
ER  -