Davies, Brian E <br/><br/>
Linear operators and their spectra 

 - New York  Cambridge university press  2007 
 - xii+451 
 - Cambridge studies in advanced mathematics .
<br/><br/> Cambridge studies in advanced mathematics Vol. 106 
<br/><br/><label>ISBN: </label>9780521866293 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Fourier transforms<br/>Perturbation theory<br/>Pseudospectrum