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Disc theorem : ウィキペディア英語版 | Disc theorem In the area of mathematics known as differential topology, the disc theorem of states that two embeddings of a closed ''k''-disc into a connected ''n''-manifold are ambient isotopic provided that if ''k'' = ''n'' the two embeddings are equioriented. The disc theorem implies that the connected sum of smooth oriented manifolds is well defined. ==References==
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抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Disc theorem」の詳細全文を読む
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