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| Ultima descărcare din IBN: 2023-10-06 10:40 |
 SM ISO690:2012COZMA, Dumitru. Center problem for cubic systems with a bundle of two invariant straight lines and one invariant conic. In: Buletinul Academiei de Ştiinţe a Republicii Moldova. Matematica, 2012, nr. 1(68), pp. 32-49. ISSN 1024-7696. |
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 Buletinul Academiei de Ştiinţe a Republicii Moldova. Matematica |
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| Numărul 1(68) / 2012 / ISSN 1024-7696 /ISSNe 2587-4322 | |||||||
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| Pag. 32-49 | |||||||
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 Descarcă PDF |
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| Rezumat | |||||||
For cubic differential systems with a bundle of two invariant straight lines
and one invariant conic it is proved that a weak focus is a center if and only if the
first four Liapunov quantities Lj , j = 1, 4, vanish. |
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| Cuvinte-cheie Center-focus problem, Cubic differential system, integrability, invariant algebraic curve |
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