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Keywords:
controllability; observability; parabolic integrodifferential equation
Summary:
In this paper, we prove the exact null controllability of certain diffusion system by rewriting it as an equivalent nonlinear parabolic integrodifferential equation with variable coefficients in a bounded interval of \$\mathbb R\$ with a distributed control acting on a subinterval. We first prove a global null controllability result of an associated linearized integrodifferential equation by establishing a suitable observability estimate for adjoint system with appropriate assumptions on the coefficients. Then this result is successfully used with some estimates for parabolic equation in \$L^k\$ spaces together with classical fixed point theorem, to prove the null controllability of the nonlinear model.
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