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    21-st and 22-nd homotopy groups of the n-th rotation group

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    We denote by Rn the n-th rotatoin group and by πk(Rn) the k-th homotopy group of Rn. We determine the group structures of the homotopy groups πk(Rn) for k=21 and 22 by use of the fibration Rn₊₁ rn→Sⁿ.ArticleJournal of the Faculty of Science Shinshu University 41: 1-28(2007)departmental bulletin pape
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