Nuclearity of Hankel operators for ultradifferentiable control systems


Opmeer, M., 2008. Nuclearity of Hankel operators for ultradifferentiable control systems. Systems & Control Letters, 57 (11), pp. 913-918.

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    Nuclearity of the Hankel operator is a known sufficient condition for convergence of Lyapunov-balanced truncations. We show how a previous result on nuclearity of Hankel operators of systems with an analytic semigroup can be extended to systems with a semigroup of class Dp with p≥1 (the case p=1 being the analytic case). For semigroups that are generated by a Dunford–Schwartz spectral operator we prove that being of class Dp is equivalent to being (Gevrey) ultradifferentiable of order p. We illustrate how for certain partial differential equations our results lead to an easy way of showing nuclearity of the Hankel operator for a wide range of control and observation operators by considering several examples of damped beams.


    Item Type Articles
    CreatorsOpmeer, M.
    DepartmentsFaculty of Science > Mathematical Sciences
    Publisher StatementOpmeer_SCL_2008_57_11_913.pdf: This is an author’s version. A definitive version was subsequently published in Systems & Control Letters, 57(11), 2008, DOI: 10.1016/j.sysconle.2008.04.007
    ID Code21029


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