Research of the group of motions in Riemann manifold is an important question of the differential geometry.

黎曼流形运动群的研究是微分几何中一个重要问题。

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Research of the group of motions in Riemann manifold is an important question of the differential geometry.

黎曼流形运动群的研究是微分几何中一个重要问题。

youdao