Currie, S.; Nowaczyk, M.; Watson, B.A.(Springer International Publishing, 2013-12)
We consider scattering on the line with a transfer condition at the origin. Under suitable growth conditions on the potential, the spectrum consists of a finite number of eigenvalues which are negative real numbers, while ...
Möller, M.; Zinsou, B.(Springer International Publishing, 2015-12)
Eigenvalue problems for even order regular quasi-differential equations with boundary conditions which depend linearly on the eigenvalue parameter λ can be represented by an operator polynomial (Formula presented.) where ...