In this paper,by giving a left invariant and symplectic structure, we have discussed the left invariant vector field and Maurer-Cartan form on Lie group,and have drawn some conclusions on them.

• 文章通过对李群上赋予一个左不变的辛结构,对李群上的左不变向量场及左不变1一形式进行研究,得出相关结论。