Abstract
We generalize a classical result concerning smooth germs of surfaces, by proving that monodromies on links of isolated complex surface singularities associated with reduced holomorphic map germs admit a positive factorization. As a consequence of this and a topological characterization of these monodromies by Anne Pichon, we conclude that a pseudoperiodic homeomorphism on an oriented surface with boundary with positive fractional Dehn twist coefficients and screw numbers, admits a positive factorization. We use the main theorem to give a sufficiency criterion for certain pseudoperiodic homeomorphisms with negative screw numbers to admit a positive factorization.
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Acknowledgements
I wish to thank Xavier Gómez-Mont for inspiring conversations. I am also very thankful to Mohammad Jabbari who is an expert in the \({\bar{\partial }}\)-problem and gave me many useful references that lead me to find the Greene and Krantz result that I ended up using. Thanks to Baldur Sigurðsson who read carefully an early version of this manuscript and pointed out a gap in a lemma that was placed instead of current Proposition 4.1. His critics and comments have helped me greatly improve the final manuscript. Finally I thank the very thorough review made by one of the referees whose numerous remarks helped me to improve many parts of the article as well as to fix some proofs that were insufficiently explained or contained gaps in an early version of this article.
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Portilla Cuadrado, P. Positive factorizations of pseudoperiodic homeomorphisms. Math. Ann. 379, 1173–1203 (2021). https://doi.org/10.1007/s00208-020-02110-5
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DOI: https://doi.org/10.1007/s00208-020-02110-5