Trefethen, Lloyd N. <br/><br/>
Spectra and pseudospectra :  the behavior of nonnormal matrices and operators / 
Lloyd N. Trefethen and Mark Embree. 
 - Princeton, NJ :  Princeton University Press,  2005. 
 - xvii, 606 p. ;  24 cm. 
<br/><br/>Includes bibliographical references and index. 
<br/><br/><label>ISBN: </label>0691119465 (alk. paper)  RM237.90 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Spectral theory (Mathematics).<br/>Spectrum analysis.<br/>Eigenvalues.<br/>Differential operators.