Subă, AlexandruVacaraş, Olga2024-07-082024-07-082023ȘUBA, Alexandru și Olga VACARAŞ. Quartic differential systems with a non-degenerate monodromic critical point and multiple line at infinity. In: Acta et commentationes. Ştiinţe Exacte și ale Naturii, 2023, nr. 2(16), pp. 25-34. ISSN 2537-628. ISSN 2537-6284.2537-6284https://doi.org/10.36120/2587-3644.v16i2.25-34https://msuir.usm.md/handle/123456789/15797ȘUBA, Alexandru și Olga VACARAŞ. Quartic differential systems with a non-degenerate monodromic critical point and multiple line at infinity. In: Acta et commentationes. Ştiinţe Exacte și ale Naturii, 2023, nr. 2(16), pp. 25-34. ISSN 2537-628. ISSN 2537-6284.The quartic differential systems with a non-degenerate monodromic critical point and non-degenerate infinity are considered. We showthat in this family the maximal multiplicity of the line at infinity is seven. Modulo the affine transformation and time rescaling the classes of systems with the line of infinity of multiplicity two, three, . . . , seven are determined. In the cases when the quartic systems have the line at infinity of maximal multiplicity the problem of the center is solved.enquartic differential systemmultiple invariant linemonodromic critical pointsistem diferential cuarticdreaptă invariantă multiplăpunct critic monodromicQUARTIC DIFFERENTIAL SYSTEMS WITH A NON-DEGENERATE MONODROMIC CRITICAL POINT AND MULTIPLE LINE AT INFINITYSistemele diferențiale cuartice ce au punct critic monodromic nedegenerat și linia de la infinit multiplăArticle