Carleman estimates for semi-discrete parabolic operators with a discontinuous diffusion coefficient and application to controllability
Abstract
In the discrete setting of one-dimensional finite-differences we prove a Carleman estimate for a semi-discretization of the parabolic operator ∂t-∂x (c∂x) where the diffusion coefficient c has a jump. As a consequence of this Carleman estimate, we deduce consistent null-controllability results for classes of semi-linear parabolic equations.
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