On the gonality of stable curves

In this paper we use admissible covers to investigate the gonality of a stable curve C over C. If C is irreducible, we compare its gonality to that of its normalization. If C is reducible, we compare its gonality to that of its irreducible components. In both cases we obtain lower and upper bounds....

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Veröffentlicht in:	Mathematische Nachrichten 2019-11, Vol.292 (11), p.2338-2351
Hauptverfasser:	Coelho, Juliana, Sercio, Frederico
Format:	Artikel
Sprache:	eng
Schlagworte:	14H10 14H51 admissible covers Closures gonality Hurwitz schemes stable curves Upper bounds
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