Zobrazeno 1 - 10
of 93
pro vyhledávání: '"Lahcen Maniar"'
Autor:
Abdeladim El Akri, Lahcen Maniar
Publikováno v:
Electronic Journal of Differential Equations, Vol 2018, Iss 133,, Pp 1-27 (2018)
This work concerns the indirect observability properties for the finite-difference space semi-discretization of the 1-d coupled wave equations with homogeneous Dirichlet boundary conditions. We assume that only one of the two components of the unk
Externí odkaz:
https://doaj.org/article/248e7c5bb08d4c5ca61285533abacae7
Publikováno v:
Electronic Journal of Differential Equations, Vol 2016, Iss 292,, Pp 1-25 (2016)
We study null controllability properties for parabolic coupled systems with degeneracy and singularity occurring in the interior of the spatial domain. This article is the first to consider a problem with singular coupling terms; previous result c
Externí odkaz:
https://doaj.org/article/239aa04543044a5e97d8b8dd4d000691
Compactness of the difference between the porous thermoelastic semigroup and its decoupled semigroup
Publikováno v:
Electronic Journal of Differential Equations, Vol 2015, Iss 173,, Pp 1-16 (2015)
Under suitable assumptions, we prove the compactness of the difference between the porous thermoelastic semigroup and its decoupled one. This will be achieved by proving the norm continuity of this difference and the compactness of the difference
Externí odkaz:
https://doaj.org/article/12aec10694264989a1fe004280fccf3b
Autor:
Younes Echarroudi, Lahcen Maniar
Publikováno v:
Electronic Journal of Differential Equations, Vol 2014, Iss 240,, Pp 1-20 (2014)
In this article, we study the null controllability of a linear model with degenerate diffusion in population dynamics. We develop first a Carleman type inequality for the adjoint system of an intermediate model, and then an observability inequalit
Externí odkaz:
https://doaj.org/article/a8fa268f5cc34663b222a4f57f15c057
Publikováno v:
Electronic Journal of Differential Equations, Vol 2014, Iss 167,, Pp 1-26 (2014)
In this article, we study an inverse problem for linear degenerate parabolic systems with one force. We establish Lipschitz stability for the source term from measurements of one component of the solution at a positive time and on a subset of the
Externí odkaz:
https://doaj.org/article/fd1134ebc3694d09a2a5e4d992f8e9fa
Publikováno v:
Electronic Journal of Differential Equations, Vol 2014, Iss 149,, Pp 1-15 (2014)
In this article, we study an inverse problem for weakly degenerate coupled parabolic systems with one force. We establish Lipschitz stability for the source term from measurements of one component of the solution at a positive time and on a subset
Externí odkaz:
https://doaj.org/article/2947652212c340a6b0ae6f2b02fb702e
Publikováno v:
Electronic Journal of Differential Equations, Vol 2011, Iss 71,, Pp 1-13 (2011)
Our goal is to prove the compactness of the difference between the thermoviscoelasticity semigroup and its decoupled semigroup. To show this, we prove the norm continuity of this difference, the compactness of the difference of their resolvents and u
Externí odkaz:
https://doaj.org/article/3082e13af8d94ae8a73e1a843ff0c900
Publikováno v:
Electronic Journal of Differential Equations, Vol 2008, Iss 60, Pp 1-9 (2008)
This paper studies the existence and uniqueness of almost automorphic mild solutions to the semilinear parabolic evolution equation $$ u'(t)=A(t)u(t)+f(t, u(t)), $$ assuming that the linear operators $A(cdot)$ satisfy the Acquistapace-Terreni conditi
Externí odkaz:
https://doaj.org/article/e704a168683944159aa8ad85ae78544b
Publikováno v:
Electronic Journal of Differential Equations, Vol 2003, Iss 62, Pp 1-15 (2003)
This paper is devoted to show a variation of constants formula for the operator solution to the non-autonomous retarded differential equation $$ x'(t)=A(t)x(t)+L(t)x_t+f(t),quad x_s=varphi, quad tgeq sgeq 0, $$ in terms of the inhomogeneous term $f$,
Externí odkaz:
https://doaj.org/article/ad6ecd3009004118b3b803fb243856fe
Publikováno v:
Semigroup Forum. 105:117-148