Results 51 to 60 of about 5,632,119 (202)

Continuous dependence of solutions for ill-posed evolution problems

open access: yesElectronic Journal of Differential Equations, 2010
We prove Holder-continuous dependence results for the difference between certain ill-posed and well-posed evolution problems in a Hilbert space. Specifically, given a positive self-adjoint operator D in a Hilbert space, we consider the ill-posed ...
Matthew Fury, Rhonda J. Hughes
doaj  

Ill-posed Problems and Instruments' Weakness [PDF]

open access: yes
Potscher (Econometrica, 2002) has pointed out that several estimation problems in econometrics are ill-posed. This paper further studies the nature of ill-posed problems in parametric models.
Grant Hillier, Giovanni Forchini
core  

Well-posedness of measurement error models for self-reported data [PDF]

open access: yes
It is widely admitted that the inverse problem of estimating the distribution of a latent variable X* from an observed sample of X, a contaminated measurement of X*, is ill-posed. This paper shows that measurement error models for self-reporting data are
Yonghong An, Yingyao Hu
core   +2 more sources

Métodos de Maz'ia e Landweber para o problema de Cauchy elíptico [PDF]

open access: yes, 2015
Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro de Ciências Físicas e Matemáticas, Programa de Pós-Graduação em Matemática Pura e Aplicada, Florianópolis, 2015.Nesta dissertação foi trabalhado o clássico exemplo de problema mal ...
Souza, Mario Luiz Previatti de
core  

Tikhonov regularization with oversmoothing penalty for non-linear ill-posed problems in Hilbert scales

open access: yes, 2017
We study Tikhonov regularization for ill-posed non-linear operator equations in Hilbert scales. Our focus is on the interplay between the smoothness-promoting properties of the penalty and the smoothness inherent in the solution.
Mathé, Peter   +3 more
core   +1 more source

Regularization of the backward heat equation via heatlets

open access: yesElectronic Journal of Differential Equations, 2008
Shen and Strang [16] introduced heatlets in order to solve the heat equation using wavelet expansions of the initial data. The advantage of this approach is that heatlets, or the heat evolution of the wavelet basis functions, can be easily computed ...
Emily McNabb   +2 more
doaj  

Skeleton Decomposition of Linear Operators in the Theory of Nonregular Systems of Partial Differential Equations

open access: yesИзвестия Иркутского государственного университета: Серия "Математика", 2017
The linear system of partial differential equations is considered. It is assumed that there is the irreversible linear operator in the main part of the system, which enjoy the skeletal decomposition.
N.A. Sidorov, D.N. Sidorov
doaj   +1 more source

First Results of Atmospheric Composition Retrieval using IASI-METOP and AIRS-AQUA Data [PDF]

open access: yes, 2009
Regularization methods for the inversion of infrared nadir sounding observations are currently investigated. An iterative Runge-Kutta type method for nonlinear ill-posed problems has been implemented and its performance has been studied using synthetic ...
Doicu, Adrian   +5 more
core  

Numerical study of two ill-posed one-phase Stefan problems [PDF]

open access: yes, 2011
We treat two related moving boundary problems. The first is the ill-posed Stefan problem for melting a superheated solid in one Cartesian coordinate. Mathematically, this is the same problem as that for freezing a supercooled liquid, with applications ...
Moroney, Timothy J.   +3 more
core   +1 more source

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