Herbert E. Rauch

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1845-, " Generalized Riccati equations for two-point boundaly value descriptor systems, " in Proc. Y. Uetake, " Realization of noncausal 2-D systems based on a descriptor model, " this issue. Absfract-Some necessary and sufficient conditions for a polynomial in a polygon of polynomials to vanish on the imaginary axis are obtained. These theorems generalize(More)
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