Singuläre S-hermitesche Rand-Eigenwertprobleme

The theory of singular self-adjoint eigenvalue problems developed by Weyl 13], Stone 12], Kodaira 2] and others has been generalized by A. Schneider 8], 9], 10], 11] to real S-hermitian systems of differential equations with real boundary conditions. Here the theory of singular S-hermitian boundary-value problems for arbitrary complex systems of differential equations with complex boundary conditions is developed. Moreover the boundary conditions are allowed to depend linearly on the eigenvalue-parameter.