Add to ORKGThe essential spectrum of operator pencils with bounded coefficients in a Hilbert space is studied. Sufficient conditions in terms of the operator coefficients of two pencils are derived which guarantee the same essential spectrum. This is done by exploiting a strong relation between an operator pencil and a specific linear subspace (linear relation)
The relation between the spectra of operator pencils with unbounded coeficients and of associated li...
Paper presented at the 4th Strathmore International Mathematics Conference (SIMC 2017), 19 - 23 June...
Abstract. In this paper, we show the stability of Gustafson, Wei-dmann, Kato, Wolf, Schechter and Br...
The essential spectrum of operator pencils with bounded coefficients in a Hilbert space is studied. ...
The essential spectrum of operator pencils with bounded coefficients in a Hilbert space is studied. ...
The essential spectrum of operator pencils with bounded coefficients in a Hilbert space is studied. ...
AbstractLet T be a closed operator on a Hilbert Space H, such that α ϵ p(T), the resolvent of T. Set...
It is a well known fact in operator theory that for any operator A, the essential spectrum of A is c...
AbstractLet T be a closed operator on a Hilbert Space H, such that α ϵ p(T), the resolvent of T. Set...
<span lang="EN-US">Let X and Y two complex Banach spaces and (A,B) a pair of bounded linear</span> o...
This monograph contains an exposition of the foundations of the spectral theory of polynomial operat...
In this paper, we give some results on the essential B-spectra of a linear operator pencil, which ar...
The relation between the spectra of operator pencils with unbounded coeficients and of associated li...
The relation between the spectra of operator pencils with unbounded coeficients and of associated li...
We introduce concepts of essential numerical range for the linear operator pencil λ↦A−λB. In contra...
The relation between the spectra of operator pencils with unbounded coeficients and of associated li...
Paper presented at the 4th Strathmore International Mathematics Conference (SIMC 2017), 19 - 23 June...
Abstract. In this paper, we show the stability of Gustafson, Wei-dmann, Kato, Wolf, Schechter and Br...
The essential spectrum of operator pencils with bounded coefficients in a Hilbert space is studied. ...
The essential spectrum of operator pencils with bounded coefficients in a Hilbert space is studied. ...
The essential spectrum of operator pencils with bounded coefficients in a Hilbert space is studied. ...
AbstractLet T be a closed operator on a Hilbert Space H, such that α ϵ p(T), the resolvent of T. Set...
It is a well known fact in operator theory that for any operator A, the essential spectrum of A is c...
AbstractLet T be a closed operator on a Hilbert Space H, such that α ϵ p(T), the resolvent of T. Set...
<span lang="EN-US">Let X and Y two complex Banach spaces and (A,B) a pair of bounded linear</span> o...
This monograph contains an exposition of the foundations of the spectral theory of polynomial operat...
In this paper, we give some results on the essential B-spectra of a linear operator pencil, which ar...
The relation between the spectra of operator pencils with unbounded coeficients and of associated li...
The relation between the spectra of operator pencils with unbounded coeficients and of associated li...
We introduce concepts of essential numerical range for the linear operator pencil λ↦A−λB. In contra...
The relation between the spectra of operator pencils with unbounded coeficients and of associated li...
Paper presented at the 4th Strathmore International Mathematics Conference (SIMC 2017), 19 - 23 June...
Abstract. In this paper, we show the stability of Gustafson, Wei-dmann, Kato, Wolf, Schechter and Br...