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For any link in the -sphere, we give a visual construction of a stable map from the -sphere into the real plane enjoying the following properties; has no cusp point, the set of definite fold points of is isotopic to the given link and only has certain type of fibers containing two indefinite fold points. As a corollary, we obtain a similar stable map from every closed orientable -manifold into the -sphere.

生成讲解博客的中文版本

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