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bn:00949406n
Noun Concept
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الفضاء بوانكاريه
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In algebraic topology, a Poincaré space is an n-dimensional topological space with a distinguished element µ of its nth homology group such that taking the cap product with an element of the kth cohomology group yields an isomorphism to the th homology group. Wikipedia
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Poincaré duality
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الفضاء بوانكاريه

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