Abstract. In this paper we develop a new method to determine the essential spectrum of coupled systems of singular differential equations. Applications to problems from magnetohydrodynamics and astrophysics are given.
AMS Subject Classification
(1991): 47A10, 34L05, 47A55, 76E99
singular differential systems,
matrix differential operators
Received December 1, 2012, and in revised form July 22, 2013. (Registered under 100/2012.)