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This paper extends the Carleman estimates to high dimensional parabolic equations with highly degenerate symmetric coefficients on a bounded domain of Lipschitz boundary and use these estimates to study the controlla?bility the…

Analysis of PDEs · Mathematics 2024-05-02 Weijia Wu , Yaozhong Hu , Hongli Sun , Donghui Yang

This article deals with the boundary null controllability of some degenerate parabolic equations posed on a square domain, presenting the first study of boundary controllability for such equations in multidimensional settings. The proof…

Analysis of PDEs · Mathematics 2025-05-26 Víctor Hernández-Santamaría , Subrata Majumdar , Luz de Teresa

This work is concerned with the obtainment of new Carleman estimates for linear parabolic equations, where the second-order differential operator brings a super strong degeneracy in a positive measure subset of the spatial domain. In order…

Analysis of PDEs · Mathematics 2024-04-22 Bruno S. V. Araújo , Reginaldo Demarque , Josiane C. O. Faria , Luiz Viana

In this paper we will generalize the Kalman rank condition for the null controllability to $n$-coupled linear degenerate parabolic systems with constant coefficients, diagonalizable diffusion matrix, and $m$-controls. For that we prove a…

Optimization and Control · Mathematics 2017-05-10 E. M. Ait Benhassi , M. Fadili , L. Maniar

This review examines classical and recent results on controllability and inverse problems for hyperbolic and dispersive equations with dynamic boundary conditions. We aim to illustrate the applicability of Carleman estimates to establish…

Optimization and Control · Mathematics 2025-05-22 S. E. Chorfi , L. Maniar , R. Morales

In this article we establish the well-posedness, energy estimates, stability, and local null controllability for the thermistor system modeled by a parabolic-parabolic system using a control force acting on just one equation of the system.…

Analysis of PDEs · Mathematics 2025-12-02 Miguel R. Nuñez-Chávez , Luis P. Yapu , Juan Límaco

The goal of the present article is to study controllability properties of mixed systems of linear parabolic-transport equations, with possibly non-diagonalizable diffusion matrix, on the one-dimensional torus. The equations are coupled by…

Optimization and Control · Mathematics 2023-01-03 Armand Koenig , Pierre Lissy

This paper is devoted to the study of the null and approximate controllability for some classes of linear coupled parabolic systems with less controls than equations. More precisely, for a given bounded domain in R^N, we consider a system…

Analysis of PDEs · Mathematics 2017-01-23 Michel Duprez , Pierre Lissy

This paper is devoted to studying the null and approximate controllability of two linear coupled parabolic equations posed on a smooth domain of R^N (N>1) with coupling terms of zero and first orders and one control localized in some…

Analysis of PDEs · Mathematics 2020-04-02 Michel Duprez , Pierre Lissy

The main objective of this paper is to establish the null controllability for the fourth order semilinear parabolic equations with the nonlinearities involving the state and its gradient up to second order. First of all, based on optimal…

Optimization and Control · Mathematics 2022-11-03 Bo You , F. Li

This paper deals with a hierarchical multi-objective control problem for forward stochastic parabolic equations with dynamic boundary conditions. The controls are divided into two classes: leaders and followers. The goal of the leaders is…

Optimization and Control · Mathematics 2024-05-27 Omar Oukdach , Said Boulite , Abdellatif Elgrou , Lahcen Maniar

In this paper, we study the null controllability of forward and backward stochastic semilinear complex Ginzburg-Landau equations with global Lipschitz nonlinear terms. For this purpose, by deriving an improved global Carleman estimates for…

Optimization and Control · Mathematics 2024-08-07 Sen Zhang , Hang Gao , Ganghua Yuan

We prove the null controllability of a one dimensional degenerate parabolic equation with drift and a singular potential. We study the case the potential arises at the left end point and the weighted Dirichlet boundary control is located at…

Analysis of PDEs · Mathematics 2023-02-03 Leandro Galo-Mendoza , Marcos López-García

In \cite{LPP:2025}, it was shown that, in arbitrary dimension, the spatial semi-discretization of a controlled stochastic parabolic operator is generically not null-controllable. Nevertheless, $\phi$-null controllability results remain…

Optimization and Control · Mathematics 2026-04-08 Rodrigo Lecaros , Ariel A. Pérez , Manuel F. Prado

We consider linear one-dimensional parabolic equations with space dependent coefficients that are only measurable and that may be degenerate or singular.Considering generalized Robin-Neumann boundary conditions at both extremities, we prove…

Analysis of PDEs · Mathematics 2015-09-03 Philippe Martin , Lionel Rosier , Pierre Rouchon

We consider two degenerate heat equations with a nonlocal space term, studying, in particular, their null controllability property. To this aim, we first consider the associated nonhomogeneous degenerate heat equations: we study their well…

Analysis of PDEs · Mathematics 2023-07-26 B. Allal , G. Fragnelli , J. Salhi

In this paper we use a Stackelberg-Nash strategy to show the local null controllability of a parabolic equation where the diffusion coefficient is the product of a degenerate function in space and a nonlocal term. We consider one control…

Optimization and Control · Mathematics 2025-09-25 Juan Límaco , João Carlos Barreira , Suerlan Silva , Luis P. Yapu

This paper deals with the hierarchic control of a degenerate parabolic equation with missing initial condition. We present a Stackelberg strategy combining the concept of null controllability with low-regret control. We assume that we can…

Optimization and Control · Mathematics 2022-09-12 Landry Djomegne , Cyrille Kenne , Romario Gildas Foko Tiomela

In this paper, we establish a global Carleman estimate for stochastic parabolic equations. Based on this estimate, we solve two inverse problems for stochastic parabolic equations. One is concerned with a determination problem of the…

Optimization and Control · Mathematics 2015-05-30 Qi Lu

This article investigates the exact controllability of three-dimensional stochastic Maxwell equations, a coupled system comprising two stochastic partial differential equations. The research establishes the observability inequality for the…

Optimization and Control · Mathematics 2026-05-26 Liying Sun , Xiaohan Wang , Yongyi Yu