Results 111 to 120 of about 485,398 (210)

Finite-dimensional perturbations of linear operators and some applications to boundary integral equations [PDF]

, 1999
Finite-dimensional perturbing operators are constructed using some incomplete information about eigen-solutions of an original and/or adjoint generalized Fredholm operator equation (with zero index).
S.E. Mikhailov, Mikhailov, SE
core   +1 more source

The pseudoinverse operator for Fredholm integral operator with degenerate kernel in Hilbert space.

, 2014
В роботі отримано умови нормальної розв’язності інтегальних операторів Фредгольма з виродженим ядром у гільбертових просторах. Побудовано псевдообернений оператор до інтегрального оператора Фредгольма з виродженим ядром у гільбертовому просторі. Наведено
Журавльов, В. П.
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On linear systems and τ functions associated with Lamé's equation and Painlevé's equation VI. [PDF]

, 2011
Painleve's transcendental differential equation PVI may be expressed as the consistency condition for a pair of linear differential equations with 2 by 2 matrix coefficients with rational entries.
Blower, Gordon
core   +2 more sources

Elliptic G-Operators on Manifolds with Isolated Singularities

Современная математика: Фундаментальные направления, 2016
We study elliptic operators on manifolds with singularities such that a discrete group G acts on the manifold. Following the standard elliptic theory approach, we de ne the Fredholm property of an operator by its principal symbol.
A. Yu. Savin, B. Yu. Sternin
doaj  

Rigorous Formulation of the Lasing Eigenvalue Problem as a Spectral Problem for a Fredholm Operator Function

, 2020
© 2018, Pleiades Publishing, Ltd. We propose a new convenient for mathematical investigation formulation of the lasing eigenvalue problem as a spectral problem for an operator-valued function, which involves boundary integral operators.
Spiridonov A., Karchevskii E., Nosich A.
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A fixed-point type result for some non-differentiable Fredholm integral equations

Mathematical Modelling and Analysis
In this paper, we present a new fixed-point result to draw conclusions about the existence and uniqueness of the solution for a nonlinear Fredholm integral equation of the second kind with non-differentiable Nemytskii operator.
Miguel A. Hernández-Verón, Sukhjit Singh, Eulalia Martínez, Nisha Yadav   +3 more
doaj   +1 more source

Fredholm linear operators associated with ordinary differential equations on noncompact intervals

Electronic Journal of Differential Equations, 1999
In the noncompact interval $J=[a,infty )$ we consider a linear problem of the form $Lx=y,; x in S$, where $L$ is a first order differential operator, $y$ a locally summable function in $J$, and $S$ a subspace of the Fr'{e}chet space of the locally ...
Mariella Cecchi, Massimo Furi, Mauro Marini, Maria Patrizia Pera   +3 more
doaj  

Regularidade de operadores de Wiener-Hopf mais Hankel [PDF]

, 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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Convergence analysis of the Legendre wavelets method for a class of Fredholm-Volterra integro-differential equations of fractional-order

Miskolc Mathematical Notes
In this paper, we develop a Legendre wavelets method for the numerical solution of Fredholm-Volterra integro-differential equations of fractional order. The Caputo sense is used to explain the fractional derivative operator.
Marziyeh Felahat
doaj   +1 more source

Evaluation of integrals for the emptiness formation probability in the square-ice model

Nuclear Physics B
We study the emptiness formation probability (EFP) in the six-vertex model with domain wall boundary conditions. We present a conjecture according to which at the ice point, i.e., when all the Boltzmann weights are equal, the known multiple integral ...
F. Colomo, A.G. Pronko
doaj   +1 more source