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28 March 2024
 
  » arxiv » 0811.3305

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Slopes of trigonal fibred surfaces and of higher dimensional fibrations
Miguel A. Barja ; Lidia Stoppino ;
Date 20 Nov 2008
AbstractWe give lower bounds for the slope of higher dimensional fibrations over curves under conditions of GIT-semistability of the fibres, using a generalization of a method of Cornalba and Harris. With the same method we establish a sharp lower bound for the slope of trigonal fibrations of even genus and general Maroni invariant; in particular this result proves a conjecture due to Harris and Stankova-Frenkel.
Source arXiv, 0811.3305
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