On the unitary equivalence of absolutely continuous parts of self-adjoint extensions

Generalized resolvents and the boundary value problems for Hermitian operators with gaps

Volodymyr Derkach, M. M. Malamud · Journal of Functional Analysis · 1991 · 548 citations

Natural Sciences, Physics, Differential Equations +12

The extension theory of Hermitian operators and the moment problem

Volodymyr Derkach, M. M. Malamud · Journal of Mathematical Sciences · 1995 · 346 citations

Natural Sciences, Mathematics, Physics +14

PERTURBATION THEORY FOR LINEAR OPERATORS

D. E. Edmunds · Journal of the London Mathematical Society · 1968 · 317 citations

Natural Sciences, Mathematics, Stochastic Processes +9

Perturbation of the continuous spectrum and unitary equivalence

Marvin Rosenblum · Pacific Journal of Mathematics · 1957 · 163 citations · Full text

Natural Sciences, Architectural Representation, Discrete Mathematics +10

Perturbation of continuous spectra by Trace class operators

Tosio Kato · Proceedings of the Japan Academy Series A Mathematical Sciences · 1957 · 141 citations · Full text

Natural Sciences, Mathematics, Dynamical Systems +16