Conţinutul numărului revistei |
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Articolul urmator |
1089 9 |
Ultima descărcare din IBN: 2023-10-06 10:40 |
SM ISO690:2012 COZMA, 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 | |||||||
Numărul 1(68) / 2012 / ISSN 1024-7696 /ISSNe 2587-4322 | |||||||
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Pag. 32-49 | |||||||
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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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