On Mei symmetry and Mei conserved quantity of Nielsen equations for a variable mass holonomic system of relative motion

Mei symmetry and Mei conserved quantity of Nielsen equations for a variable mass holonomic system of relative motion have been discussed.The Nielsen equations' differential equations of motion for the system,the definition and criterion of Mei symmetry,and the expression of the corresponding Mei conserved quantity for the system have been worked out.Moreover,an example has been given to illustrate the application of the results