On the spectrum of a weak class of operator pencils of waveguide type
Mahir Hasanov · Mathematische Nachrichten · 2006
Abstract The paper introduces a new class of two parameter non‐overdamped operator pencils arising from evolution equations. We investigate spectral properties, including variational principles for “interior” points of the spectrum. Examples leading to pencils of the new class are given. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)