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研究Vacco动力学方程的形式不变性即Mei对称性，给出其定义和确定方程，研究Vacco动力学方程的Mei对称性与Noether对称性、Lie对称性之间的关系，寻求系统的守恒量，给出一 个例子说明结果的应用.
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关键词:
- Vacco动力学方程 /
- Mei对称性 /
- Noether对称性 /
- Lie对称性 /
- 守恒量
The Mei symmetry, i.e.the form invariance, of a Vacco system is studied. The Definition and the determining equation of Mei symmetry in the Vacco system are given. The relations among the Mei symmetry, the Lie symmetry and the Noether symmetry are studied, and the conserved quantities of the Vacco system are obtained. An example is finally given to illustrate the application of the result of this paper.-
Keywords:
- Vacco system /
- Mei symmetry /
- Noether sysmmetry /
- Lie symmetry /
- conserved quantity
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