Results 101 to 110 of about 2,211 (224)
On nonlinear Fredholm integral equations with non‐differentiable Nemystkii operator [PDF]
, 2020 [EN] From decomposition method for operators, we consider a Newton-Steffensen iterative scheme for approximating a solution of nonlinear Fredholm integral equations with non-differentiable Nemystkii operator.
Hernández-Verón, M.A. +3 more
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On classes of Fredholm type operators
FilomatGiven an idempotent p in a Banach algebra and following the study in [6] of p-invertibility, we consider here left p-invertibility, right p-invertibility and p-invertibility in the Calkin Algebra C(X), where X is a Banach space. Then we define and study left and right generalized Drazin invertibility and we characterize left and right Drazin invertible
Hamdan, Alaa, Berkani, Mohammed
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Degenerate Integro-Differential Equations of Convolution Type in Banach Spaces
Известия Иркутского государственного университета: Серия "Математика", 2016 We consider an integro-differential equation in convolutions of a special kind in Banach spaces with the Fredholm operator in the main part. The article concerns with the problem of unique solvability of the Cauchy-problem for this equation in the class ...
M. Falaleev
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On Semi-Fredholm Operators [PDF]
, 1992 VIe prove that every semi-Fredholm operator on a.n arbitrary Banach space can be approxima.ted by injective or surjective operators. In the case of a complex separable Hilbert space, we show that the set of semi-Fredholm operators having a fixed index is
FERNANDO GALAZ FONTES
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Bifurcation theory for Fredholm operators
Journal of Differential EquationsThis paper consists of four parts. It begins by using the authors's generalized Schauder formula, [50], and the algebraic multiplicity, $χ$, of Esquinas and López-Gómez [18,17,40] to package and sharpening all existing results in local and global bifurcation theory for Fredholm operators through the recent author's axiomatization of the Fitzpatrick ...
Julián López-Gómez +1 more
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The Kato decomposition of quasi-Fredholm relations
, 2010 Quasi-Fredholm relations of degree d is an element of N in Hilbert spaces are defined in terms of conditions on their ranges and kernels. They are completely characterized in terms of an algebraic decomposition with a quasi-Fredholm relation of degree 0 ...
J.- h. Labrousse +11 more
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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
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Perturbation theory of p-adic Fredholm and semi-Fredholm operators
, 2004 The main goal of this paper is to prove that Fredholm and semi-Fredholm operators between p-adic (or non-archimedean) Banach spaces, as well as the index of those that are Fredholm, are preserved when they are perturbed by a small operator.
C Perez-Garcia +3 more
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Interpolation of Fredholm operators
Advances in Mathematics, 2016 We prove novel results on interpolation of Fredholm operators including an abstract factorization theorem. The main result of this paper provides sufficient conditions on the parameters $θ\in (0,1)$ and $q\in \lbrack 1,\infty ]$ under which an operator $A$ is a Fredholm operator from the real interpolation space $(X_{0},X_{1})_{θ,q}$ to $(Y_{0},Y_{1})_{
Asekritova, I. +2 more
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Regularidade de operadores de Wiener-Hopf mais Hankel
, 2011 Doutoramento em MatemáticaIn this thesis we consider Wiener-Hopf-Hankel operators with Fourier symbols in the class of almost periodic, semi-almost periodic and piecewise almost periodic functions.
Silva, Anabela de Sousa e
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