Szukana fraza: [Abstract = "The class of well\-posed linear systems contains most linear time\-independent distributed parameter systems\: internal or boundary control of PDE's, integral equations, delay equations, etc. These systems have existed in an implicit form in the mathematics literature for a long time, and they are closely connected to the scattering theory by Lax and Phillips and to the model theory by Sz.\-Nagy and Foiaş."]

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