力学中的对称性与守恒量的关系

The Relationship between Symmetry and Conserved Quantity in Mechanics

在力学中，对称性与守恒量是密不可分的，由运动规律的某种对称性就必然相应的存在一个守恒定律和一个守恒量，本文通过对拉格朗日力学中的一些对称性与守恒定律之间关系的证明与分析，得出这些关系的物理本源．

Genarally symmetry and conserved quantity are inseparable in Mechanics. If law of motion possesses such kind of sym metry, there surely exsits conservation rule inevitably, of which these origin of physics can be drawed according to some certification and analysis of the relationship between symmetry and conservation rule in the aspect of Lagrange Mechanics.