2014/08/24 by Chrastinova, Veronika, Tryhuk, Vaclav
#Differential Geometry (math.DG) #FOS: Mathematics
paper · doi:10.48550/arxiv.1408.5610
The article concerns the problem if a~given system of differential equations is identical with the Euler--Lagrange system of an~appropriate variational integral. Elementary approach is applied. The main results involve the determination of the first--order variational integrals related to the second--order Euler--Lagrange systems.