单词poincare-conjecture
网络: 庞加莱猜想；庞卡瑞猜想；庞卡赫猜想
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。