Results 11 to 20 of about 160 (154)

Discrete Carleman estimates and three balls inequalities [PDF]

open access: yesCalculus of Variations and Partial Differential Equations, 2021
AbstractWe prove logarithmic convexity estimates and three balls inequalities for discrete magnetic Schrödinger operators. These quantitatively connect the discrete setting in which the unique continuation property fails and the continuum setting in which the unique continuation property is known to hold under suitable regularity assumptions.
Fernández-Bertolin, Aingeru   +3 more
openaire   +6 more sources

Resolvent Estimates for the Lamé Operator and Failure of Carleman Estimates [PDF]

open access: yesJournal of Fourier Analysis and Applications, 2021
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Kwon, Yehyun, Lee, Sanghyuk, Seo, Ihyeok
openaire   +1 more source

Carleman Estimates and Absence of Embedded Eigenvalues [PDF]

open access: yesCommunications in Mathematical Physics, 2006
26 ...
Koch, Herbert, Tataru, Daniel
openaire   +3 more sources

Some Estimates For The Carleman Function

open access: yesThe American Journal of Applied sciences, 2021
In this article we consider Carlеman’s functions, to find integral representation for the polygarmonious functions defined in unbounded domain of Euclidean space which ...
Ashurova Zebiniso Raximovna   +1 more
openaire   +1 more source

Carleman estimates for stratified media

open access: yesJournal of Functional Analysis, 2011
Let \(\Omega=\Omega'\times (-H,H)\) be a cylinder in \(\mathbb R^n\), where \(\Omega'\) is a nonempty bounded set in \(\mathbb R^{n-1}\). Let \(S=\Omega'\times\{0\}\) be an interface where coefficients and functions may jump. The authors prove Carleman estimates for anisotropic elliptic and parabolic operators with discontinuities on \(S\).
Benabdallah, Assia   +2 more
openaire   +2 more sources

Controllability of a fluid-structure interaction system coupling the Navier–Stokes system and a damped beam equation

open access: yesComptes Rendus. Mathématique, 2023
We show the local null-controllability of a fluid-structure interaction system coupling a viscous incompressible fluid with a damped beam located on a part of its boundary.
Buffe, Rémi, Takahashi, Takéo
doaj   +1 more source

Carleman estimate for the Navier–Stokes equations and applications [PDF]

open access: yesInverse Problems, 2022
Abstract For linearized Navier–Stokes equations, we first derive a Carleman estimate with a regular weight function. Then we apply it to establish conditional stability for the lateral Cauchy problem and finally we prove conditional stability estimates for the inverse source problem of determining a spatially varying divergence-free ...
Oleg Y Imanuvilov   +2 more
openaire   +4 more sources

Local exact controllability of the age-dependent population dynamics with diffusion

open access: yesAbstract and Applied Analysis, 2001
We investigate the local exact controllability of a linear age and space population dynamics model where the birth process is nonlocal. The methods we use combine the Carleman estimates for the backward adjoint system, some estimates in the theory of ...
Bedr'eddine Ainseba, Sebastian Anita
doaj   +1 more source

Controllability results for weakly blowing up reaction-diffusion system

open access: yesElectronic Journal of Qualitative Theory of Differential Equations, 2012
In this paper, we consider the controllability of a general reaction-diffusion system with homogeneous Dirichlet boundary conditions. We prove the exact controllability to the trajectories and the approximate controllability of the system which contains ...
Qiang Tao, Hang Gao, Ying Yang
doaj   +1 more source

A strongly ill-posed integro-differential parabolic problem with integral boundary conditions

open access: yesMathematical Modelling and Analysis, 2013
Via Carleman estimates we prove uniqueness and continuous dependence results for an identification and strongly ill-posed linear integro-differential parabolic problem with the Dirichlet boundary condition, but with no initial condition.
Alfredo Lorenzi
doaj   +1 more source

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