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arXiv 1003.4007math.AG
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以向井为例

On an example of Mukai

H. Lange, V. Mercat, P. E. Newstead

摘要:

本文以Mukai为例,在亏格为9或11的曲线上构造了秩为3的具有6个独立截面的半稳定丛,且Clifford指数严格小于曲线的Clifford指数.这个例子也使我们能够证明一些具有负期望维数的Brill-Noether轨迹的非空性。

英文摘要:

In this note we use an example of Mukai to construct semistable bundles of rank 3 with 6 independent sections on a curve of genus 9 or 11 with Clifford index strictly less than the Clifford index of the curve. The example also allows us to show the non-emptiness of some Brill-Noether loci with negative expected dimension.

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