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Stability of Normal Bundles of Space Curves

Algebraic Geometry 2022-08-17 v2

Abstract

In this paper, we prove that the normal bundle of a general Brill-Noether space curve of degree dd and genus g2g \geq 2 is stable if and only if (d,g)∉{(5,2),(6,4)}(d,g) \not\in \{ (5,2), (6,4) \}. When g1g\leq1 and the characteristic of the ground field is zero, it is classical that the normal bundle is strictly semistable. We show that this fails in characteristic 22 for all rational curves of even degree.

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Cite

@article{arxiv.2003.02964,
  title  = {Stability of Normal Bundles of Space Curves},
  author = {Izzet Coskun and Eric Larson and Isabel Vogt},
  journal= {arXiv preprint arXiv:2003.02964},
  year   = {2022}
}

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29 pages