http://cris.utm.md/handle/5014/633 2026-04-10T06:10:19Z 2026-04-10T06:10:19Z POPA, Mihail PRICOP, Victor http://cris.utm.md/handle/5014/1869 2023-11-15T14:36:31Z 2022-01-01T00:00:00Z

Title: The Center and Focus Problem Algebraic Solutions and Hypotheses Authors: POPA, Mihail; PRICOP, Victor Abstract: This book focuses on an old problem of the qualitative theory of differential equations, called the Center and Focus Problem. It is intended for mathematicians, researchers, professors and Ph.D. students working in the field of differential equations, as well as other specialists who are interested in the theory of Lie algebras, commutative graded algebras, the theory of generating functions and Hilbert series. The book reflects the results obtained by the authors in the last decades. A rather essential result is obtained in solving Poincaré's problem. Namely, there are given the upper estimations of the number of Poincaré-Lyapunov quantities, which are algebraically independent and participate in solving the Center and Focus Problem that have not been known so far. These estimations are equal to Krull dimensions of Sibirsky graded algebras of comitants and invariants of systems of differential equations.

2022-01-01T00:00:00Z MUNTEAN, Neli PIROGOVA, Oksana PLOTNIKOV, Vladimir VERTAKOVA, Iulia http://cris.utm.md/handle/5014/1868 2023-11-15T13:21:57Z 2022-01-01T00:00:00Z

Title: Digital Tools to Support Market Interaction (The Case of CRM Systems) Authors: MUNTEAN, Neli; PIROGOVA, Oksana; PLOTNIKOV, Vladimir; VERTAKOVA, Iulia

2022-01-01T00:00:00Z MALCOCI, V. http://cris.utm.md/handle/5014/1867 2023-11-15T12:50:35Z 2021-01-01T00:00:00Z

Title: Petru Balan – scenograf consacrat din Republica Moldova Authors: MALCOCI, V.

2021-01-01T00:00:00Z FILIPSKI, Tatiana http://cris.utm.md/handle/5014/1866 2023-11-15T12:42:10Z 2021-01-01T00:00:00Z

Title: Educația muzeală. Colaborarea instituții de învățământ-muzeu-familie-comunitate Authors: FILIPSKI, Tatiana

2021-01-01T00:00:00Z