Unique continuation property and control for the Benjamin-Bona-Mahony equation on the torus

Details Unique continuation property and control for the Benjamin-Bona-Mahony equation on the torus Unique continuation property and control for the Benjamin-Bona-Mahony equation on the torus

2012-02-13

arxiv.org/abs/1202.2667v1

Mathematics

Analysis of PDEs

Scientific paper

We consider the Benjamin-Bona-Mahony (BBM) equation on the one dimensional torus T = R/(2{\pi}Z). We prove a Unique Continuation Property (UCP) for small data in H^1(T) with nonnegative zero means. Next we extend the UCP to certain BBM-like equations, including the equal width wave equation and the KdV-BBM equation. Applications to the stabilization of the above equations are given. In particular, we show that when an internal control acting on a moving interval is applied in BBM equation, then a semiglobal exponential stabilization can be derived in H^s(T) for any s \geq 1. Furthermore, we prove that the BBM equation with a moving control is also locally exactly controllable in H^s(T) for any s \geq 0 and globally exactly controllable in H s (T) for any s \geq 1.

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