Add to ORKGSome properties of bounded operators on Hilbert space concerned with matrix representations in orthonormal bases are presented. In particular, the classes of operators with columns or diagonals converging to 0 are described
One of the many characterizations of compact operators is as linear operators whichcan be closely ap...
A concept of an orthonormal basis for Hilbert C∗-modules is dis-cussed. It is proved that each Hilbe...
AbstractSuppose that {ek} is an orthonormal basis for a separable, infinite-dimensional Hilbert spac...
Some properties of bounded operators on Hilbert space concerned with matrix representations in ortho...
In this note two properties of compact operators acting on a separable Hilbert space are discussed. ...
Very often the operators that we study appear most naturally in highly non-diagonal representation. ...
Very often the operators that we study appear most naturally in highly non-diagonal representation. ...
Abstract. A linear operator on a Hilbert space may be approximated with finite matrices by choosing ...
We introduce the concept of essential numerical range We(T) for unbounded Hilbert space operators T ...
We study the relations between a Hilbert space operator and the numerical ranges of its powers in th...
We introduce the concept of essential numerical range We(T) for unbounded Hilbert space operators T ...
AbstractSuppose that {ek} is an orthonormal basis for a separable, infinite-dimensional Hilbert spac...
Assume H is a Hilbert space and K is a dense linear (not necessarily closed) subspace. The question ...
This paper investigates a class of self-adjoint compact operators in Hilbert spaces related to their...
We introduce the concept of essential numerical range We(T) for unbounded Hilbert space operators T ...
One of the many characterizations of compact operators is as linear operators whichcan be closely ap...
A concept of an orthonormal basis for Hilbert C∗-modules is dis-cussed. It is proved that each Hilbe...
AbstractSuppose that {ek} is an orthonormal basis for a separable, infinite-dimensional Hilbert spac...
Some properties of bounded operators on Hilbert space concerned with matrix representations in ortho...
In this note two properties of compact operators acting on a separable Hilbert space are discussed. ...
Very often the operators that we study appear most naturally in highly non-diagonal representation. ...
Very often the operators that we study appear most naturally in highly non-diagonal representation. ...
Abstract. A linear operator on a Hilbert space may be approximated with finite matrices by choosing ...
We introduce the concept of essential numerical range We(T) for unbounded Hilbert space operators T ...
We study the relations between a Hilbert space operator and the numerical ranges of its powers in th...
We introduce the concept of essential numerical range We(T) for unbounded Hilbert space operators T ...
AbstractSuppose that {ek} is an orthonormal basis for a separable, infinite-dimensional Hilbert spac...
Assume H is a Hilbert space and K is a dense linear (not necessarily closed) subspace. The question ...
This paper investigates a class of self-adjoint compact operators in Hilbert spaces related to their...
We introduce the concept of essential numerical range We(T) for unbounded Hilbert space operators T ...
One of the many characterizations of compact operators is as linear operators whichcan be closely ap...
A concept of an orthonormal basis for Hilbert C∗-modules is dis-cussed. It is proved that each Hilbe...
AbstractSuppose that {ek} is an orthonormal basis for a separable, infinite-dimensional Hilbert spac...