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![]() CALIN, Iurie, CIUBOTARU, Stanislav. The Lyapunov quantities and the center conditions for a class of bidimensional polynomial systems of differential equations with nonlinearities of the fourth degree. In: Buletinul Academiei de Ştiinţe a Republicii Moldova. Matematica, 2017, nr. 2(84), pp. 112-130. ISSN 1024-7696. |
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Buletinul Academiei de Ştiinţe a Republicii Moldova. Matematica | ||||||
Numărul 2(84) / 2017 / ISSN 1024-7696 /ISSNe 2587-4322 | ||||||
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CZU: 512.628+519.956 | ||||||
MSC 2010: 34C05, 58F14 | ||||||
Pag. 112-130 | ||||||
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Rezumat | ||||||
For the autonomous bidimensional polynomial systems of differential equations with nonlinearities of the fourth degree the GL(2, R)-invariant recurrence equations for determination of the Lyapunov quantities were established. Moreover, the general form of Lyapunov quantities for the mentioned systems is obtained. For a class of such systems the necessary and sufficient GL(2,R)-invariant conditions for the existence of center are given. |
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Cuvinte-cheie Polynomial differential systems, invariant, comitant, transvectant, center conditions, Lyapunov quantities |
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