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bn:03406365n
Noun Concept
EL
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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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IS A
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τοπολογική πολλαπλότητα
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connected space
HAS INSTANCE
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NAMED AFTER
Ανρί Πουανκαρέ
STUDIED BY
θεωρία κατηγοριών
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