summary:In the present work, using a formula describing all scalar spectral functions of a Carleman operator $A$ of defect indices $( 1,1) $ in the Hilbert space $L^{2}( X,\mu ) $ that we obtained in a previous paper, we derive certain results concerning the localization of the spectrum of quasi-selfadjoint extensions of the operator $A$
AbstractA continuation of [6]. Gershgorin-type estimates for spectra in Banach spaces and Hilbert sp...
Spectrum analysis, corresponding to self-conjugate elliptic differential and pseudodifferential oper...
A bounded linear operator T 08 L(X) on aBanach space X is said to satisfy "Browder's theorem" if th...
summary:In the present work, using a formula describing all scalar spectral functions of a Carleman ...
Abstract. The object of the present work is to construct all the generalized spectral functions of a...
summary:The object of the present work is to construct all the generalized spectral functions of a c...
In this paper we describe the closed convex hull of orthogonal resolvents of an abstract symmetric o...
We prove that, given two elliptic operators A₁ and A₂ in Lᵖ(Ω₁) and Lᵖ(Ω₂) respectively whose spectr...
AbstractThis paper deals with Volterra perturbations of normal operators in a separable Hilbert spac...
Let A be a selfadjoint operator in a Hilbert space-9. Its rank one perturbations A + r(., co)co, T E...
"Operator Functions and Localization of Spectra" is the first book that presents a systematic exposi...
In this paper the localization properties of the spectral expansions of distributions related to th...
We study several unbounded operators with view to extending von Neumann’s theory of deficiency indic...
The Carleman classes of a scalar type spectral operator in a reflexive Banach space are characterize...
Let A and à be bounded operators in a Hilbert space. We consider the following problem: let the spe...
AbstractA continuation of [6]. Gershgorin-type estimates for spectra in Banach spaces and Hilbert sp...
Spectrum analysis, corresponding to self-conjugate elliptic differential and pseudodifferential oper...
A bounded linear operator T 08 L(X) on aBanach space X is said to satisfy "Browder's theorem" if th...
summary:In the present work, using a formula describing all scalar spectral functions of a Carleman ...
Abstract. The object of the present work is to construct all the generalized spectral functions of a...
summary:The object of the present work is to construct all the generalized spectral functions of a c...
In this paper we describe the closed convex hull of orthogonal resolvents of an abstract symmetric o...
We prove that, given two elliptic operators A₁ and A₂ in Lᵖ(Ω₁) and Lᵖ(Ω₂) respectively whose spectr...
AbstractThis paper deals with Volterra perturbations of normal operators in a separable Hilbert spac...
Let A be a selfadjoint operator in a Hilbert space-9. Its rank one perturbations A + r(., co)co, T E...
"Operator Functions and Localization of Spectra" is the first book that presents a systematic exposi...
In this paper the localization properties of the spectral expansions of distributions related to th...
We study several unbounded operators with view to extending von Neumann’s theory of deficiency indic...
The Carleman classes of a scalar type spectral operator in a reflexive Banach space are characterize...
Let A and à be bounded operators in a Hilbert space. We consider the following problem: let the spe...
AbstractA continuation of [6]. Gershgorin-type estimates for spectra in Banach spaces and Hilbert sp...
Spectrum analysis, corresponding to self-conjugate elliptic differential and pseudodifferential oper...
A bounded linear operator T 08 L(X) on aBanach space X is said to satisfy "Browder's theorem" if th...
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