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We recall, from the end of Section 21, that a finite triangulated 3-manifold K is orientable if each of its components K; has a nonvanishing 3-dimensional homology group[r]
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We recall, from the end of Section 21, that a finite triangulated 3-manifold K is orientable if each of its components K; has a nonvanishing 3-dimensional homology group[r]
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