bn:03406365n
Noun Concept
JA
ホモロジー3-球面  ホモロジー球面  ポワンカレホモロジー球面  有理ホモロジー3-球面  ポアンカレホモロジー球
EN
In algebraic topology, a homology sphere is an n-manifold X having the homology groups of an n-sphere, for some integer n ≥ 1 {\displaystyle n\geq 1}. Wikipedia
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