AbstractThe spectral theory for unbounded normal operators is used to develop a systematic method of approximating functions of operators with other, more easily computable functions, leading to a priori error estimates in the operator norm. In particular, polynomial approximations are obtained for resolvents and semigroups in terms of inverses and resolvents, respectively
This thesis presents and develops two tools which can be used to work with lower bounds of operators...
This book is a basic and comprehensive introduction to the use of spectral methods for the approxima...
Holomorphic functions of one operator frequently occur in pure as applied mathematics. For instance,...
AbstractThe spectral theory for unbounded normal operators is used to develop a systematic method of...
Spectral theory of bounded linear operators teams up with von Neumann’s theory of unbounded operator...
Exact eigenvalues, eigenvectors, and principal vectors of operators with infinite dimensional ranges...
AbstractRefined error estimates are obtained for the approximation of discrete spectra of linear ope...
AbstractSpectral theory for bounded linear operators is used to develop a general class of approxima...
In this paper, we extent the classical spectral approximation theory for compact and bounded operato...
Graduation date: 1973In this thesis we examine the approximation theory of the\ud eigenvalue problem...
The paper deals with operators of the form A = S + B, where B is a compact operator in a Hilbert spa...
Abstract. The methods of arbitrarily high orders of accuracy for the solution of an ab-stract ordina...
A minimal normal extension of unbounded subnormal operators is established and characterized and spe...
A minimal normal extension of unbounded subnormal operators is established and characterized and spe...
This book is a basic and comprehensive introduction to the use of spectral methods for the approxima...
This thesis presents and develops two tools which can be used to work with lower bounds of operators...
This book is a basic and comprehensive introduction to the use of spectral methods for the approxima...
Holomorphic functions of one operator frequently occur in pure as applied mathematics. For instance,...
AbstractThe spectral theory for unbounded normal operators is used to develop a systematic method of...
Spectral theory of bounded linear operators teams up with von Neumann’s theory of unbounded operator...
Exact eigenvalues, eigenvectors, and principal vectors of operators with infinite dimensional ranges...
AbstractRefined error estimates are obtained for the approximation of discrete spectra of linear ope...
AbstractSpectral theory for bounded linear operators is used to develop a general class of approxima...
In this paper, we extent the classical spectral approximation theory for compact and bounded operato...
Graduation date: 1973In this thesis we examine the approximation theory of the\ud eigenvalue problem...
The paper deals with operators of the form A = S + B, where B is a compact operator in a Hilbert spa...
Abstract. The methods of arbitrarily high orders of accuracy for the solution of an ab-stract ordina...
A minimal normal extension of unbounded subnormal operators is established and characterized and spe...
A minimal normal extension of unbounded subnormal operators is established and characterized and spe...
This book is a basic and comprehensive introduction to the use of spectral methods for the approxima...
This thesis presents and develops two tools which can be used to work with lower bounds of operators...
This book is a basic and comprehensive introduction to the use of spectral methods for the approxima...
Holomorphic functions of one operator frequently occur in pure as applied mathematics. For instance,...
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