规范场01 abel01 non-abel01
回答: 庞加莱01 定义一个弯曲的三维空间为一个四维物体的表面,庞加莱天才地定义一个称为“基本群”的工具来检测孔,扭,和其它任意维空间的
由 marketreflections
于 2011-08-29 20:02:28
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