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JOURNALS // Journal of Samara State Technical University, Ser. Physical and Mathematical Sciences // Archive

Vestn. Samar. Gos. Tekhn. Univ., Ser. Fiz.-Mat. Nauki [J. Samara State Tech. Univ., Ser. Phys. Math. Sci.], 2012 Issue 2(27), Pages 7–17 (Mi vsgtu1012)

This article is cited in 1 paper

Differential Equations

Properties of the integral curve and solving of non-autonomous system of ordinary differential equations

G. A. Rudykh, D. J. Kiselevich

Institute of Mathematics, Economics and Informatics of Irkutsk State University, Irkutsk, Russia

Abstract: In this paper, we consider non-autonomous system of ordinary differential equations. For a given non-autonomous system, we introduce the distribution probability-density function of representative points of the ensemble of Gibbs, possessing all the characteristic properties of the probability-density function, and satisfying the partial differential equation of the first order (Liouville equation). It is shown that such distribution probability-density function exists and represents the only solution of the Cauchy problem for the Liouville equation. We consider the properties of the integral curve and the solutions of non-autonomous system of ordinary differential equations. It is shown that under certain assumptions, the motion along trajectories of the system is the maximum of the distribution probability-density function, that is, if all the required terms are satisfied, an integral curve of non-autonomous system of ordinary differential equations at any given time is the most probable trajectory. For the linear non-autonomous system of ordinary differential equations, it is shown that the motion along the trajectories is carried out in the mode of distribution probability-density function and the estimate of its solutions is found.

Keywords: system of ordinary differential equations, Liouville equation, distribution probability-density function, integral curve, maximum movement.

UDC: 517.938

MSC: 34А34

Original article submitted 24/X/2011
revision submitted – 10/V/2011

DOI: 10.14498/vsgtu1012



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