AbstractA theorem that is of aid in computing the domain of the adjoint operator is provided. It may serve e.g. as a criterion for selfadjointness of a symmetric operator, for normality of a formally normal operator or for H-selfadjointness of an H-symmetric operator. Differential operators and operators given by an infinite matrix are considered as examples
We provide two criteria for selfadjointness in a Krein space, which are closely connected with the n...
AbstractFor bounded Hilbert space operators and for all unitarily invariant norms there hold||||A−B|...
In general, it is a non-trivial task to determine the adjoint (Formula presented.) of an unbounded o...
AbstractA theorem that is of aid in computing the domain of the adjoint operator is provided. It may...
Let C be a skew-diagonal constant matrix satisfying C −1 = −C = C . We characterize the self-adjoint...
We give an answer to the following problem: Given two linear operators A and B such that BA and A ve...
We characterize the two point boundary conditions which determine symmetric ordinary differential ...
We will discuss the following theorem, proved originally in [2] for formally normal and normal opera...
We give an answer to the following problem: Given two linear operators A and B such that BA and A ve...
AbstractThe self-adjoint subspace extensions of a possibly nondensely defined symmetric operator in ...
Suppose that h, k ∈ L(H) are two selfadjoint bounded operators on a Hilbert space H. It is elementa...
AbstractThe GKN (Glazman, Krein, Naimark) Theorem characterizes all self-adjoint realizations of lin...
AbstractA full description is given of n-selfadjoint normal operators in Krein spaces of finite defe...
Essential Self-Adjointness of Linear Operators on Hilbert Spaces and Spectral Theory Abstract: Unbou...
AbstractWe show that any self-adjoint operator A (bounded or unbounded) in a Hilbert space H=(V,(·,·...
We provide two criteria for selfadjointness in a Krein space, which are closely connected with the n...
AbstractFor bounded Hilbert space operators and for all unitarily invariant norms there hold||||A−B|...
In general, it is a non-trivial task to determine the adjoint (Formula presented.) of an unbounded o...
AbstractA theorem that is of aid in computing the domain of the adjoint operator is provided. It may...
Let C be a skew-diagonal constant matrix satisfying C −1 = −C = C . We characterize the self-adjoint...
We give an answer to the following problem: Given two linear operators A and B such that BA and A ve...
We characterize the two point boundary conditions which determine symmetric ordinary differential ...
We will discuss the following theorem, proved originally in [2] for formally normal and normal opera...
We give an answer to the following problem: Given two linear operators A and B such that BA and A ve...
AbstractThe self-adjoint subspace extensions of a possibly nondensely defined symmetric operator in ...
Suppose that h, k ∈ L(H) are two selfadjoint bounded operators on a Hilbert space H. It is elementa...
AbstractThe GKN (Glazman, Krein, Naimark) Theorem characterizes all self-adjoint realizations of lin...
AbstractA full description is given of n-selfadjoint normal operators in Krein spaces of finite defe...
Essential Self-Adjointness of Linear Operators on Hilbert Spaces and Spectral Theory Abstract: Unbou...
AbstractWe show that any self-adjoint operator A (bounded or unbounded) in a Hilbert space H=(V,(·,·...
We provide two criteria for selfadjointness in a Krein space, which are closely connected with the n...
AbstractFor bounded Hilbert space operators and for all unitarily invariant norms there hold||||A−B|...
In general, it is a non-trivial task to determine the adjoint (Formula presented.) of an unbounded o...
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