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Meromorphic functions without real critical values and related braids
Stockholm University, Faculty of Science, Department of Mathematics.ORCID iD: 0000-0002-8438-3971
Number of Authors: 22023 (English)In: European Journal of Mathematics, ISSN 2199-675X, E-ISSN 2199-6768, Vol. 9, no 3, article id 70Article in journal (Refereed) Published
Abstract [en]

We study the open subset of the Hurwitz space, consisting of meromorphic functions of a given degree defined on closed Riemann surfaces of a given genus and having no real critical values, and enumerate its connected components in terms of braids. Specifically, to a function in this open set, we assign a braid in the braid group of the underlying closed surface and characterize all braids which might appear using this construction. We introduce the equivalence relation among these braids such that the braids corresponding to the meromorphic functions from the same connected component of the above Hurwitz space are equivalent while non-equivalent braids correspond to distinct connected components. Several special families of meromorphic functions, some applications, and further problems are discussed.

Place, publisher, year, edition, pages
2023. Vol. 9, no 3, article id 70
Keywords [en]
Hurwitz spaces, Meromorphic functions, Braids and links, Pencils of binary forms and matrices
National Category
Geometry
Identifiers
URN: urn:nbn:se:su:diva-221116DOI: 10.1007/s40879-023-00662-9ISI: 001040934900002Scopus ID: 2-s2.0-85163823612OAI: oai:DiVA.org:su-221116DiVA, id: diva2:1798474
Available from: 2023-09-19 Created: 2023-09-19 Last updated: 2023-09-19Bibliographically approved

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Shapiro, Boris Z.

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