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arXiv 1210.7835math.AG
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复射影空间上向量丛的纯分解

Pure resolutions of vector bundles on complex projective spaces

Marcos Jardim, Daniela Moura Prata

摘要:

证明了射影空间上向量丛的纯分解的三个结果。首先,我们证明了Pn上存在秩为n的单向量丛,其同调维数为任意。然后分析了某个代数的Koszul复形的层化和压缩Gorenstein-Artin分次代数的最小自由分解的层化所给出的纯分解,证明了它们的合偶是单向量丛.我们的主要工具是最初建立的Brambilla的结果,我们给出了一个替代的证明使用表示的颤抖。

英文摘要:

We prove three results on pure resolutions of vector bundles on projective spaces. First, we show that there are simple vector bundles of rank n on Pn with arbitrary homological dimension. We then analyze the pure resolutions given by the sheafification of the Koszul complex of a certain algebra and by the sheafification of the minimal free resolution of a compressed Gorenstein Artinian graded algebra, proving that their syzygies are simple vector bundles. Our main tool is a result originally established by Brambilla, for which we give an alternative proof using representations of quivers.

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