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Unsolved Problems in Mathematical Systems and Control Theory by Vincent D. Blondel, Alexandre Megretski

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Problem 7.3

Three problems in the field of

observability

Philippe Jouan

Laboratoire R. Salem

CNRS UMR 6085

Université de Rouen

Mathématiques, site Colbert

76821 Mont-Saint-Aignan Cedex

France

Philippe.Jouan@univ-rouen.fr

1 INTRODUCTION.

16732

16093

3 PROBLEM 2.

Once we know that a controlled system is observable in the weak sense of [4] (two different initial states have to be distinguished by the output for at least one input) a question arises naturally: which inputs are universal? (An input is universal if any two different initial states are distinguished ...

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