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arXiv 1202.4948math.AGmath-phmath.MP
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射影空间上稳定复形的表示

Representing stable complexes on projective spaces

Jason Lo, Ziyu Zhang

摘要:

给出了$\mathbb{P}^3$上自反层的$c_3$的一个Bogomolov型不等式的显式证明.然后,利用$\mathbb{P}^3$上秩2自反层的分解,证明了秩2复形中既有PT-稳定模又有双PT-稳定模的某些层是商栈。使用单子,我们将相同的技术,$\mathbb{P}^2$和显示,一些阶层的Bridgeland稳定的复合物的模量是商栈。

英文摘要:

We give an explicit proof of a Bogomolov-type inequality for $c_3$ of reflexive sheaves on $\mathbb{P}^3$. Then, using resolutions of rank-two reflexive sheaves on $\mathbb{P}^3$, we prove that some strata of the moduli of rank-two complexes that are both PT-stable and dual-PT-stable are quotient stacks. Using monads, we apply the same techniques to $\mathbb{P}^2$ and show that some strata of the moduli of Bridgeland-stable complexes are quotient stacks.

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