We establish criteria for the spectrum of a generalized indefinite string to be purely discrete and to satisfy Schatten–von Neumann properties. The results can be applied to the isospectral problem associated with the conservative Camassa–Holm flow and to Schrödinger operators with δ′ -interactions.
Funding
Austrian Science Fund (FWF) under Grants No. P30715 and I-4600
Slovenian Research Agency (ARRS) under Grant No. N1-0137
History
School
Science
Department
Mathematical Sciences
Published in
From Complex Analysis to Operator Theory: A Panorama