LIU Yandong, ZHANG Yi. Noether quasi-symmetry and conserved quantity for fractional Lagrange system in terms of Caputo derivatives[J]. Acta Scientiarum Naturalium Universitatis SunYatseni, 2018,57(3):149-154.
LIU Yandong, ZHANG Yi. Noether quasi-symmetry and conserved quantity for fractional Lagrange system in terms of Caputo derivatives[J]. Acta Scientiarum Naturalium Universitatis SunYatseni, 2018,57(3):149-154.DOI:
The Noether quasi-symmetry and the conserved quantity for a fractional Lagrange system are studied by using the time-reparameterization method. Firstly
the fractional Lagrange equations in terms of Caputo derivatives are derived; Secondly
the definition of fractional conserved quantity for the fractional Lagrange system is given
and based on the special infinitesimal transformations of group without transforming time
the definition and the criterion of the Noether quasisymmetry for the fractional Lagrange system are given
and Noether's quasi-symmetry theorem is established; Finally
the definition and the criterion of Noether quasi-symmetry for the fractional Lagrange system under the general infinitesimal transformations of group with transforming time are given
Noether's quasi-symmetry theorem is derived by using the time-reparameterization method. An example is given to illustrate the application of the results.