Knowledge of elementary algebraic topology and elementary differential geometry is recommended, but not required.

建议事先知道一些关于代数拓扑和微分几何的基本知识，但不是必需的。

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Knowledge of elementary algebraic topology and elementary differential geometry is recommended, but not required.

建议事先知道一些关于代数拓扑和微分几何的基本知识，但不是必需的。

youdao