Browsing Articole ştiinţifice by Author "NEAGU, Natalia"

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Center-affine invariant conditions of stability of unperturbed motion for differential system s(1,2,3) with quadratic part of Darboux type

NEAGU, Natalia; ORLOV, Victor (Universitatea de Stat din Tiraspol, 2018)

The Lie algebra, the Lyapunov series and the center-affine invariant conditions of stability of unperturbed motion have been determined by critical Lyapunov system with quadratic part of Darboux type.
First integrals with polynomials not higher than second order of the mathematical model of the intrinsic transmission dynamics of tuberculosis

NEAGU, Natalia; POPA, Mihail; ORLOV, Victor (Institutul de Matematică şi Informatică al AŞM, 2014)

For the mathematical model of the intrinsic transmission dynamics of tuberculosis (TB) all first integrals with polynomials not higher than second order were found.
Invariant conditions of stability of unperturbed motion for differential systems with quadratic nonlinearities in the critical case

NEAGU, Natalia; ORLOV, Victor; POPA, Mihail (Institutul de Matematică şi Informatică al AŞM, 2017)

The center-affine invariant conditions of stability of unperturbed motion governed by differential systems in the plane with quadratic nonlinearities in the critical case were determined.
Invariant conditions of stability of unperturbed motion governed by some differential systems in the plane

NEAGU, Natalia; ORLOV, Victor; POPA, Mihail (Institutul de Matematică şi Informatică al AŞM, 2017)

Center-affine invariant conditions of the stability of unperturbed motion were determined for differential systems in the plane with polynomial nonlinearities in non-critical cases and for differential systems in the plane ...

Browsing Articole ştiinţifice by Author "NEAGU, Natalia"

Browsing Articole ştiinţifice by Author "NEAGU, Natalia"

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