Invertibility of nonnegative Hamiltonian operator with unbounded entries

The Essential Spectrum of Some Matrix Operators

F. V. Atkinson, Heinz Langer, R. Mennicken · Mathematische Nachrichten · 1994 · 205 citations

Natural Sciences, Chemistry, Algebra +12

Perturbation of closed operators and their adjoints

Tosio Kato · Commentarii Mathematici Helvetici · 1970 · 38 citations

Natural Sciences, Property Law, Temporary Anchorage Devices +9

Invertibility of Nonnegatively Hamiltonian Operators in a Hilbert Space

Differential Equations · 2001 · 28 citations

Natural Sciences, Mathematics, Physics +12

On the boundedness of Hamiltonian operators

T. Ya. Azizov, Aad Dijksma, Irina V. Gridneva · Proceedings of the American Mathematical Society · 2002 · 23 citations · Full text

Natural Sciences, Physics, Quantum Mechanics +10

An Indefinite Approach to the Reduction of a Nonnegative Hamiltonian Operator Function to a Block Diagonal Form

T. Ya. Azizov · Functional Analysis and Its Applications · 2001 · 14 citations

Natural Sciences, Mathematics, Physics +8