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Mapping class groups of trigonal loci

  • Michele Bolognesi [1] ; Michael Lönne [2]
    1. [1] Université de Rennes 1
    2. [2] Mathematisches Institut - Lehrstuhl Mathematik VII
  • Localización: Selecta Mathematica, New Series, ISSN 1022-1824, Vol. 22, Nº. 1, 2016, págs. 417-445
  • Idioma: inglés
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  • Resumen
    • In this paper, we study the topology of the stack TgTg of smooth trigonal curves of genus g over the complex field. We make use of a construction by the first named author and Vistoli, which describes TgTg as a quotient stack of the complement of the discriminant. This allows us to use techniques developed by the second named author to give presentations of the orbifold fundamental group of TgTg , and of its substrata with prescribed Maroni invariant, and describe their relation with the mapping class group MapgMapg of Riemann surfaces of genus g.


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