A. N. Kusyumov
Department of Aerohydrodynamics, Kazan State Technical University
Karl Marks Str. 10
420111 Kazan, Russia
The functional is considered. The variables, included in a Lagrangian, will be transformed by an operation of continuous group of transformations, and an integration limits of the functional do not vary. The conditions of a functional invariance are determined. The connection of the functional invariance condition with a problem of conservation laws determination for a system of ordinary differential equations is considered.