Boundary Triplets and Boundary Pairs for Semibounded Relations
Jussi Behrndt, Seppo Hassi, Henk S. V. de Snoo · Monographs in mathematics · 2020
Semibounded relations in a Hilbert space automatically have equal defect numbers, so that there are always self-adjoint extensions. In this chapter the semibounded self-adjoint extensions of a semibounded relation will be investigated.