Abstract
The moment problem as formulated by Krein and Nudel’man is a beautiful generalization of several important classical moment problems, including the power moment problem, the trigonometric moment problem and the moment problem arising in Nevanlinna-Pick interpolation. Motivated by classical applications and examples, in both finite and infinite dimensions, we recently formulated a new version of this problem that we call the moment problem for positive rational measures. The formulation reflects the importance of rational functions in signals, systems and control. While this version of the problem is decidedly nonlinear, the basic tools still rely on convexity. In particular, we present a solution to this problem in terms of a nonlinear convex optimization problem that generalizes the maximum entropy approach used in several classical special cases.
This research was supported in part by grants from AFOSR, Swedish Research Council, Swedish Foundation for Strategic Research, and the Göran Gustafsson Foundation.
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In memory of Mark Grigoryevich Krein on the occasion of the 100th anniversary of his birth
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Byrnes, C.I., Lindquist, A. (2009). The Moment Problem for Rational Measures: Convexity in the Spirit of Krein. In: Adamyan, V.M., et al. Modern Analysis and Applications. Operator Theory: Advances and Applications, vol 190. Birkhäuser Basel. https://doi.org/10.1007/978-3-7643-9919-1_9
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DOI: https://doi.org/10.1007/978-3-7643-9919-1_9
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