The first, the second, and the third Liouville formula and periodical solutions of linear differential equation of the second order


Miloje RajoviŠ, Rade StojiljkoviŠ


In this paper, the need for reviving the classical theory of Liouville is emphasized, in order to determine only periodical solutions of linear differential equations this time. \\ This problem, being one of the most important problems in the practice of differential equations (Mechanics, Mechanical engineering, Electronics) due to fast and in a way impulsive development of these sciences, has not been sufficiently systematically solved.