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arXiv 1702.06252math.AG
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负自交曲线曲面的Bridgeland稳定性条件

Bridgeland stability conditions on surfaces with curves of negative self-intersection

Rebecca Tramel, Bingyu Xia

摘要:

设$X$是光滑复射影簇. 2002年,Bridgeland定义了$D^b(X)$中对象的稳定性概念,该概念是$X$上相干层的有界导出范畴,推广了曲线上向量丛的斜率稳定性概念。在$X$上的稳定性条件和该簇的几何形状之间有许多很好的联系。我们构造了新的稳定性条件,曲面包含曲线$C$,其自相交是负的。我们表明,这些稳定性条件位于${\rm Stab}(X)$的几何室的壁上,稳定性流形的$X$。然后我们构造了$σ$的模空间$M_σ(\mathcal{O}_X)$-半稳定对象的类$[\mathcal{O}_X]$在$K_0(X)$的穿墙后。

英文摘要:

Let $X$ be a smooth complex projective variety. In 2002, Bridgeland defined a notion of stability for the objects in $D^b(X)$, the bounded derived category of coherent sheaves on $X$, which generalized the notion of slope stability for vector bundles on curves. There are many nice connections between stability conditions on $X$ and the geometry of the variety. We construct new stability conditions for surfaces containing a curve $C$ whose self-intersection is negative. We show that these stability conditions lie on a wall of the geometric chamber of ${\rm Stab}(X)$, the stability manifold of $X$. We then construct the moduli space $M_σ(\mathcal{O}_X)$ of $σ$-semistable objects of class $[\mathcal{O}_X]$ in $K_0(X)$ after wall-crossing.

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