Критерий абсолютной устойчивости многосвязных импульсных систем с нестационарными характеристиками нелинейных элементов
Yakov Zalmanovitch Tsypkin, Michael S. Epelman (1965)
Kybernetika
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Yakov Zalmanovitch Tsypkin, Michael S. Epelman (1965)
Kybernetika
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Štefan Schwabik (2000)
Mathematica Bohemica
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This paper is a continuation of []. In [] results concerning equations of the form x(t) = x(a) +at [A(s)]x(s) +f(t) - f(a) were presented. The Kurzweil type Stieltjes integration in the setting of [] for Banach space valued functions was used. Here we consider operator valued solutions of the homogeneous problem (t) = I +dt [A(s)](s) as well as the variation-of-constants formula for the former equation.
Jaromír Baštinec (1991)
Mathematica Bohemica
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Bz the quadrileteral condition in a given net there is meant the following implication: If are arbitrary points, no three of them lie on the same line, with coll (collinearity) for any five from six couples then there follows the collinearity coll for the remaining couple . In the article there is proved the every net satisfying the preceding configuration condition is necessarity the Ostrom net (i.e., the net over a field). Conversely, every Ostrom net satisfies the above configuration...
Beloslav Riečan (1969)
Matematický časopis
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