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Now showing items 61-69 of 69

#### Some controllability results for the 2D Kolmogorov equation

(2009-12-31)

In this article, we prove the null controllability of the 2D Kolmogorov equation both in the whole space and in the square. The control is a source term in the right-hand side of the equation, located on a subdomain, that ...

#### Hardy inequalities, observability, and control for the wave and schrödinger equations with singular potentials

(2009-12-31)

We address the question of exact controllability of the wave and Schrodinger equa\-tions perturbed by a singular inverse-square potential. Exact boundary controllability is proved in the range of subcritical coefficients ...

#### Uniformly exponentially stable approximations for a class of damped systems

(2009-12-31)

We consider time semi-discrete approximations of a class of exponentially stable infinite-dimensional systems modeling, for instance, damped vibrations. It has recently been proved that for time semi-discrete systems, due ...

#### Numerical dispersive schemes for the nonlinear Schrödinger equation

(2009-12-31)

We consider semidiscrete approximation schemes for the linear Schrödinger equation and analyze whether the classical dispersive properties of the continuous model hold for these approximations. For the conservative finite ...

#### Stabilization of the wave equation on 1-D networks

(2009-12-31)

In this paper we study the stabilization of the wa ve equation on general 1-d networks. For that, we transfer known observability results in the context of control problems of conservative systems (see [R. Dáger and E. ...

#### 2-D euler shape design on nonregular flows using adjoint rankine-hugoniot relations

(2009-12-31)

Optimal aerodynamic shape design aims to find the minimum of a functional that describes an aerodynamic property, by controlling the partial differential equation modeling the dynamics of the flow that surrounds an aircraft, ...

#### Convergence of a two-grid algorithm for the control of the wave equation

(2009-12-31)

We analyze the problem of boundary observability of the finite-difference space semidiscretizations of the 2-d wave equation in the square.We prove the uniform (with respect to the meshsize) boundary observability for the ...

#### Time discrete wave equations: Boundary observability and control

(2009-12-31)

In this paper we study the exact boundary controllability of a trapezoidal time discrete wave equation in a bounded domain. We prove that the projection of the solution in an appropriate filtered space is exactly controllable ...

#### Identification of the class of initial data for the insensitizing control of the heat equation

(2009-12-31)

This paper is devoted to analyze the class of initial data that can be insensitized for the heat equation. This issue has been extensively addressed in the literature both in the case of complete and approximate insensitization ...