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某些皮卡秩为一的簇上合冲丛的稳定性

Stable and unstable syzygy bundles on certain Picard rank one varieties

Supravat Sarkar

arXiv 2607.10585首次发表:更新:

AI 中文总结

研究维数至少为\(2\)且皮卡秩为\(1\)的光滑射影簇上合冲丛稳定性,证明在此类簇上丰富线丛合冲丛稳定,尤其适用于射影空间完全交,扩展了前人成果。

AI 中文摘要

若\(X\)是维数至少为\(2\)且皮卡秩为\(1\)的光滑射影簇,其上每个丰富线丛都是整体生成的,我们证明了任何丰富线丛的合冲丛是稳定的。这尤其适用于射影空间中的完全交。此结果扩展了蒋仁、科安达等人的早期成果。

英文摘要

If $X$ is a smooth projective variety of dimension $\geq 2$ and Picard rank $1$ on which every ample line bundle has at least $2$ linearly independent sections, we prove that syzygy bundle of any nontrivial globally generated line bundle is stable. We apply this to show stability of syzygy bundles in non-general type complete intersections in weighted projective spaces, and all complete intersections in projective spaces. This extends earlier results of Jiang-Ren, Coand{ă} and others. We also show that in any dimension $\geq 2$, there is a smooth projective variety of Picard rank $1$ with an unstable syzygy bundle. This completely answers a question of Fulger-Langer.

论文原文

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