Clifford Indices for Vector Bundles on Curves

Clifford Indices for Vector Bundles on Curves
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曲线上向量束的 Clifford 指数

DOI:
10.1007/978-3-0346-0288-4_6
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发表时间:
2008
期刊:
arXiv: Algebraic Geometry
影响因子:
--
通讯作者:
P. Newstead
P. Newstead
中科院分区:
--
文献类型:
--
作者:
H. Lange;P. Newstead

文献摘要

被引文献

相似文献

对于亏格 g ≥ 4 的平滑投影曲线,克利福德指数是一个重要的不变量,它为线束截面空间的维数提供了界限。这是区分同属曲线的第一步。在本文中,我们将其推广为曲线上半稳定向量丛的 Clifford 指数。我们研究这些不变量,给出一些基本属性,并对小等级、一般曲线和一些特殊曲线进行一些计算。对于经典克利福德指数为 2 的曲线,我们计算新克利福德指数的所有值。
For smooth projective curves of genus g ≥ 4, the Clifford index is an important invariant which provides a bound for the dimension of the space of sections of a line bundle. This is the first step in distinguishing curves of the same genus. In this paper we generalise this to introduce Clifford indices for semistable vector bundles on curves. We study these invariants, giving some basic properties and carrying out some computations for small ranks and for general and some special curves. For curves whose classical Clifford index is two, we compute all values of our new Clifford indices.