Abstract
AbstractIn this paper, we investigate exact controllability for coupled wave equations which have variable coefficients principal part. Observability inequality is obtained by using Riemannian geometry method and Carleman estimates. Furthermore, the exact controllability result is established with Dirichlet boundary controls when T>T0, where the lower bound T0 for the control time T is different from that obtained in the constant coefficient principal part case.Copyright © 2010 John Wiley and Sons Asia Pte Ltd and Chinese Automatic Control Society
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