Results 211 to 219 of about 1,470 (219)

Boundary controllability for variable coefficients one-dimensional wave equation with interior degeneracy

Journal of Applied Analysis
Abstract In this paper, we study boundary controllability for the linear extension problem of a wave equation with space-dependent coefficients and having an internal degeneracy. For this purpose, we mainly focus on the well-posedness and the boundary null controllability of a relaxed version of the original problem, namely, to some ...
Jawad Salhi
exaly   +2 more sources

Null controllability of a retarded population dynamics model with interior degeneracy

Mathematical Methods in the Applied Sciences, 2023
In this work, we establish a null controllability property of a dispersive age‐structured population dynamics model with finite‐time delay on the mortality rate term. We assume that the dispersion term includes an interior degeneracy satisfying some suitable assumptions. To achieve our main results, we act according to the classical procedure, which is
Boubacar Diao, Younes Echarroudi, Kamal Khalil   +2 more
openaire   +1 more source

Inverse problems for parabolic equations with interior degeneracy and Neumann boundary conditions

Journal of Inverse and Ill-posed Problems, 2015
Abstract We consider a parabolic problem with degeneracy in the interior of the spatial domain and we focus on the well-posedness of the problem and on inverse source problems. The novelties of the present paper are two. First, the degeneracy point is in the interior of the spatial domain.
Idriss Boutaayamou, Genni Fragnelli, Lahcen Maniar   +2 more
openaire   +1 more source

A Control Approach for an Identification Problem Associated to a Strongly Degenerate Parabolic System with Interior Degeneracy

2014
We study an identification problem associated with a strongly degenerate parabolic evolution equation of the type $$\displaystyle{y_{t} -\mathit{Ay} = f(t,x),\quad (t,x) \in Q:= (0,T) \times (0,L)}$$ equipped with Dirichlet boundary conditions, where T > 0, L > 0, and f is in a suitable L 2 space.
Fragnelli, Genni, Marinoschi, Gabriela, Mininni, Rosamaria, Romanelli, Silvia   +3 more
openaire   +2 more sources

An inverse problem of Robin coefficient identification in parabolic equations with interior degeneracy from terminal observation data

Applied Numerical Mathematics
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Ould Sidi, H., Hendy, A. S., Babatin, M. M., Qiao, L., Zaky, M. A.   +4 more
openaire   +2 more sources

Inverse problems for parabolic equations with interior degeneracy and Neumann boundary conditions

Journal of Inverse and Ill-Posed Problems, 2016
Genni Fragnelli, Lahcen Maniar
exaly  

Carleman Estimates and Observability Inequalities for a Class of Problems Ruled by Parabolic Equations with Interior Degenaracy

Applied Mathematics and Optimization, 2020
Faria, Jco
exaly  

An Interior-Point Approach to Sensitivity Analysis in Degenerate Linear Programs

SIAM Journal on Optimization, 2002
exaly  

Degeneracy degrees of constraint collections

Mathematical Methods of Operations Research, 2003
exaly