Abstract
Positive real systems were first discovered and studied in the Networks and Circuits scientific community, by the German scientist Wilhelm Cauer in his 1926 Ph.D. thesis [1–4]. However, the term positive real has been coined by Otto Brune in his 1931 Ph.D. thesis [5, 6], building upon the results of Ronald M. Foster [7] (himself inspired by the work in [8], and we stop the genealogy here). O. Brune was in fact the first to provide a precise definition and characterization of a positive real transfer function (see [6, Theorems II, III, IV, V]).
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CITATION STYLE
Brogliato, B., Lozano, R., Maschke, B., & Egeland, O. (2020). Positive Real Systems. In Communications and Control Engineering (pp. 9–79). Springer International Publishing. https://doi.org/10.1007/978-3-030-19420-8_2
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