Abstract. The problem of localization of spectral singularities of dissipative operators in terms of the asymptotic of the corresponding exponential function is studied. We give a solution to this problem for the singularities of higher orders in the frame of perturbation theory.
AMS Subject Classification
(1991): 47B44, 47D06
Received March 12, 2003. (Registered under 5820/2009.)