Abstract
The Pick-Nevanlinna interpolation theory in classical analysis plays an important role in the recent progress of linear system theory in the frequency domain. In this paper, we shall show how the classical interpolation theory which relies heavily on function theoretic properties is described in the algebraic framework of the state space. The notion of conjugation, or more specifically, of J-lossless conjugation is shown to be the state-space representation of the classical interpolation, or its modern versions. Thus, the notion of J-lossless conjugation provides a unified treatment of the H ∞ control problems, as well as of robust stabilization and the model reduction.
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Kimura, H. (1989). State space approach to the classical interpolation problem and its applications. In: Nijmeijer, H., Schumacher, J.M. (eds) Three Decades of Mathematical System Theory. Lecture Notes in Control and Information Sciences, vol 135. Springer, Berlin, Heidelberg. https://doi.org/10.1007/BFb0008465
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DOI: https://doi.org/10.1007/BFb0008465
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