TY  - BOOK
AU  - Trefethen, LIoyd N  .
TI  - Spectra and pseudospectra: the bahavior of nonnormal matrices and operators / 
SN  - 0-691-11946-5
U1  - B 
PY  - 2005///
CY  - New Jersey : 
PB  - Princeton University Press , 
KW  - Spectrum analysis
ER  -