... Curtain and H. Zwart, An Introduction to In nite-Dimensional Linear Systems Theory,vol.21ofTexts in Applied Mathematics, Springer, New York, NY, USA, 1995.Hindawi Publishing CorporationBoundary ... andreproduction in any medium, provided the original work is properly cited.1. Introduction In this paper we prove the interior approximate controllability for the following 2×2 reaction-diffusion system with ... Theory, vol. 137 of Graduate Texts in Mathematics,Springer, New York, NY, USA, 1992.3 R. F. Curtain and A. J. Pritchard, In nite Dimensional Linear Systems Theory, vol. 8 of Lecture Notes in Control...