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庞卡赫

庞卡赫

庞卡赫

庞卡赫

1

to understand the poincare conjecture and perelman ' s proof in greater depth , you have to know something about topology.

如果要更深入理解庞卡赫猜想与帕瑞尔曼的证明，你必须懂一点拓扑学。

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