Results 101 to 110 of about 4,674,369 (143)
Journal of Inequalities and Applications, 2008 The theory of measures of noncompactness has many applications on topology, functional analysis, and operator theory. In this paper, we consider one axiomatic approach to this notion which includes the most important classical definitions.
Dehici Abdelkader +3 more
doaj
Bifurcation into gaps in the essential spectrum.
Journal für die reine und angewandte Mathematik (Crelles Journal), 1990 Küpper, T., Stuart, Charles A.
openaire +2 more sources
, 1991 Literary journalhttps://nwcommons.nwciowa.edu/spectrum/1016/thumbnail ...
Spectrum Contributors,
core
Essential g-Ascent and g-Descent of a Closed Linear Relation in Hilbert Spaces
Extracta Mathematicae, 2017 We define and discuss for a closed linear relation in a Hilbert space the notions of essential g-ascent (resp. g-descent) and g-ascent (resp. g-descent) spectrums. We improve in the Hilbert space case some results given by E.
Zied Garbouj, Haı̈kel Skhiri
doaj
, 2019 This paper is devoted to an investigation of the relationship between the essential approximate point spectrum (respectively, the essential defect spectrum) of a sequence of closed linear operators (Tn)n2N on a Banach space X, and the essential ...
TOUFIK, HERAIZ
core
Essential Spectrum Due to Singularity
, 2008 Lund University, May 23–25, 2002 It is proven that the essential spectrum of any self-adjoint operator associated with the matrix differential expression −
Pavel Kurasov, Serguei Naboko
core
Remark on the Essential Spectrum of Symmetrizable Operators
Proceedings of the Japan Academy, 1971 openaire +3 more sources
Some of the next articles are maybe not open access.
Related searches:
Related searches:
The S-Jeribi Essential Spectrum
Ukrainian Mathematical Journal, 2021zbMATH Open Web Interface contents unavailable due to conflicting licenses.
openaire +2 more sources
2009
If B(H) is the algebra of bounded linear operators on a Hilbert space (H) and K is the ideal of compact operators on (H), one forms the Calkin algebra B(H)/K and the natural map π: B(H) → B(H)/K. Recall that A∈B(H) is Fredholm if π(A) is invertible in B(H)/K. A well-known theorem [19, p.
Alexandru Aleman +2 more
openaire +1 more source
If B(H) is the algebra of bounded linear operators on a Hilbert space (H) and K is the ideal of compact operators on (H), one forms the Calkin algebra B(H)/K and the natural map π: B(H) → B(H)/K. Recall that A∈B(H) is Fredholm if π(A) is invertible in B(H)/K. A well-known theorem [19, p.
Alexandru Aleman +2 more
openaire +1 more source