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2 Control and Cybernetics

2 1999

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Controllability of semilinear wave equations with infinitely iterated logarithms

Cannarsa P., Komornik V., Loreti P.

Control and Cybernetics

1999

Vol. 28, no 3

449-461

In a previous work we improved some earlier results of Imanuvilov, Li and Zhang, and of Zuazua, on the boundary exact controllability of semilinear wave equations by weakening the growth assumptions on the nonlinearity. Answering a question of Zuazua we give a still weaker, essentially optimal condition. Furthermore, we establish an approximate internal controllability result under the same growth assumptions.

Boundary observability, controllability and stabilizability of linear distributed systems with a time reversible dynamics

Komornik V.

Control and Cybernetics

1999

Vol. 28, no 4

813-838

The paper provides a short introduction into the theory of boundary exact controllability and uniform stabilization of linear distributed systems, based on the multiplier method.