| Articolul precedent |
| Articolul urmator |
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 SM ISO690:2012COZMA, Dumitru, DASCALESCU, Anatolii. Integrability conditions for a cubic differential system with a bundle of two invariant straight lines and one invariant cubic. In: Conference of Mathematical Society of the Republic of Moldova, 28 iunie - 2 iulie 2017, Chişinău. Chişinău: Centrul Editorial-Poligrafic al USM, 2017, 4, pp. 269-272. ISBN 978-9975-71-915-5. |
| EXPORT metadate: Google Scholar Crossref CERIF DataCite Dublin Core |
| Conference of Mathematical Society of the Republic of Moldova 4, 2017 |
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Conferința "Conference of Mathematical Society of the Republic of Moldova" Chişinău, Moldova, 28 iunie - 2 iulie 2017 | ||||||
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| Pag. 269-272 | ||||||
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For a cubic differential system with a bundle of two invariant straight lines and one invariant cubic it is proved that a weak focus is a center if and only if the first three Lyapunov quantities Lj , j = 1, 3 vanish. |
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| Cuvinte-cheie Cubic differential system, Center-focus problem, invariant algebraic curve, integrability, Lyapunov quantity |
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