Homotopical theory of periodic points of periodic homeomorphisms on closed surfaces (Q842982)

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scientific article; zbMATH DE number 5608088
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Homotopical theory of periodic points of periodic homeomorphisms on closed surfaces
scientific article; zbMATH DE number 5608088

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    Homotopical theory of periodic points of periodic homeomorphisms on closed surfaces (English)
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    28 September 2009
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    Let \(M\) be a compact manifold and let \(f:M\to M\) be a map. The prime Nielsen periodic number \(NP_n(f)\) gives a lower bound for the number of periodic points with least period \(n\), whereas the full Nielsen-Jiang periodic number \(NF_n(f)\) gives a lower bound for the number of fixed points of \(f^n\). The authors prove the so called Wecken theorem in case \(f\) is a periodic homeomorphism and \(M\) is a closed surface, i.e., they show that for each \(n\) there are homeomorphisms \(g_P\) and \(g_F\) in the isotopy class of \(f\) such that \(g_P\) has precisely \(NP_n(f)\) periodic points of least period \(n\) and \(g_F\) has precisely \(NF_n(f)\) fixed points. More generally, assume that \(M\) is a closed surface with non-negative Euler characteristic and let \(A\) be an outer automorphism of \(\pi_1(M,x_0)\) of finite order. If then \(f:M\to M\) is a map such that \([f_\#]=A\) then the Wecken theorem holds for \(f\).
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    periodic point
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    Wecken theory
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    homotopy minimal period
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