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量子上同调
辛拓扑和代数几何中,量子上同调环是闭辛流形的普通上同调环的推广。有“小环”和“大环”两种定义,一般来说后者更复杂,包含的信息也更多。系数环(一般是诺维科夫环)的选择也会对其结构产生重大影响。 普通上同调的上积描述了子流形如何相交,而 ...
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