MANUELA GÎRŢU “Vasile Alecsandri” University of Bacău, Faculty of Engineering, Department of Power Engineering, Mechatronics and Computer Science, 157 Calea Mărăşeşti, Bacău, 600115, Romania, e-mail: girtum@yahoo.com
In this paper we describe some geometrical structures on the manifold fibred over M: Liouville vector fields, almost tangent structure, semisprays, nonlinear connections and we show how these can be used in the study of mechanical systems.
