Results 11 to 20 of about 26,746 (306)

Inverse spectral problem for Dirac operators by spectral data

open access: yesFilomat, 2017
This work deals with the solution of the inverse problem by spectral data for Dirac operators with piecewise continuous coefficient and spectral parameter contained in boundary condition. The main theorem on necessary and sufficient conditions for the solvability of inverse problem is proved. The algorithm of the reconstruction of potential
Akcay, Ozge, Mamedov, Khanlar R.
openaire   +4 more sources

The inverse spectral problem [PDF]

open access: yesSurveys in Differential Geometry, 2004
The inverse spectral problem on a Riemannian manifold (M, g), possibly with boundary, is to determine as much as possible of the geometry of (M, g) from the spectrum of its Laplacian ∆g (with some given boundary conditions).
Steve Zelditch
openaire   +2 more sources

An inverse spectral problem for Sturm-Liouvile operator with integral delay

open access: yesElectronic Journal of Differential Equations, 2017
In this article, we study an inverse spectral problem for Sturm-Liouville operator with integral delay. We prove that the standard spectral asymptotic conditions are necessary and sufficient for unique solvability of the inverse problem.
Manaf Dzh. Manafov
doaj   +1 more source

Inverse spectral problem for Jacobi operators and Miura transformation

open access: yesConcrete Operators, 2021
We study a Miura-type transformation between Kac - van Moerbeke (Volterra) and Toda lattices in terms of the inverse spectral problem for Jacobi operators, which appear in the Lax representation for such systems.
Osipov Andrey
doaj   +1 more source

Nonlocal Inverse Problem for a Pseudohyperbolic- Pseudoelliptic Type Integro-Differential Equations

open access: yesAxioms, 2020
The questions of solvability of a nonlocal inverse boundary value problem for a mixed pseudohyperbolic-pseudoelliptic integro-differential equation with spectral parameters are considered.
Tursun K. Yuldashev
doaj   +1 more source

Inverse Spectral Problems in Rectangular Domains [PDF]

open access: yesCommunications in Partial Differential Equations, 2007
We consider the Schrodinger operator in n-dimensional rectangular domains with either Dirichlet or Neumann boundary conditions on the faces and study the constraints on the potential imposed by fixing the spectrum of the operator.We study also the asymptotics of the heat kernel when t tends to 0.
Eskin, Gregory, Ralston, James
openaire   +2 more sources

Solvability and Stability of the Inverse Problem for the Quadratic Differential Pencil

open access: yesMathematics, 2021
The inverse spectral problem for the second-order differential pencil with quadratic dependence on the spectral parameter is studied. We obtain sufficient conditions for the global solvability of the inverse problem, prove its local solvability and ...
Natalia P. Bondarenko, Andrey V. Gaidel
doaj   +1 more source

An Integrable Evolution System and Its Analytical Solutions with the Help of Mixed Spectral AKNS Matrix Problem

open access: yesMathematics, 2022
In this work, a novel integrable evolution system in the sense of Lax’s scheme associated with a mixed spectral Ablowitz-Kaup-Newell-Segur (AKNS) matrix problem is first derived.
Sheng Zhang, Jiao Gao, Bo Xu
doaj   +1 more source

On a uniqueness theorem of Sturm–Liouville equations with boundary conditions polynomially dependent on the spectral parameter

open access: yesBoundary Value Problems, 2018
Inverse nodal problems for Sturm–Liouville equations associated with boundary conditions polynomially dependent on the spectral parameter are studied. The authors show that a twin-dense subset WB([a,b]) $W_{B}([a,b])$ can uniquely determine the operator ...
Yu Ping Wang   +2 more
doaj   +1 more source

Approximation of Bayesian inverse problems for PDEs [PDF]

open access: yes, 2010
Inverse problems are often ill posed, with solutions that depend sensitively on data. In any numerical approach to the solution of such problems, regularization of some form is needed to counteract the resulting instability.
Dashti, Massoumeh   +7 more
core   +1 more source

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