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Vanishing thetanulls on curves with involutions

Abstract : The configuration of theta characteristics and vanishing thetanulls on a hyperelliptic curve is completely understood. We observe in this note that analogous results hold for the s-invariant theta characteristics on any curve C with an involution s . As a consequence we get examples of non hyperelliptic curves with a high number of vanishing thetanulls.
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https://hal.archives-ouvertes.fr/hal-00756738
Contributor : Arnaud Beauville <>
Submitted on : Friday, November 23, 2012 - 4:11:54 PM
Last modification on : Monday, October 12, 2020 - 10:27:29 AM

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  • HAL Id : hal-00756738, version 1
  • ARXIV : 1206.5411

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Arnaud Beauville. Vanishing thetanulls on curves with involutions. Rendiconti del Circolo Matematico di Palermo, 2013, 62 (1), pp.61-66. ⟨hal-00756738⟩

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