Thurston 这些几何片必是8种具有双曲度量的3维流形之一”,Poincare猜想只是Thurston猜测的特例
回答: 最通常的空间完整性,即空洞区域内空洞数量的度量,测量法称为欧拉函数,欧拉数=(空洞数)-(碎片数-1),这里空洞数是外部多边形自
由 marketreflections
于 2011-12-10 17:33:59
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