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arXiv 1111.5398math.AGmath.DG
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特殊测试配置和$K$-Fano品种的稳定性

Special test configurations and $K$-stability of Fano varieties

Chi Li, Chenyang Xu

摘要:

对于任何平坦的射影族$(\mX,\mL)\rightarrow C$,使得一般纤维$\mX_η$是klt Q-Fano簇和$\mL|_{\mX_η}\sim_{Q}-K_{X_η}$,我们使用来自极小模型程序(MMP)的技术来修改整个族。最终产品是一个系列,每个纤维都是klt Q-Fano品种。此外,我们可以证明,出现的模型的Donaldson-Futaki不变量减少。当族是固定Fano簇$(X,-K_X)$的检验构形时,这就意味着田氏猜想:给定$X$一个Fano流形,要检验它的K-(半,多)稳定性,我们只需要在特殊的检验构形上检验.

英文摘要:

For any flat projective family $(\mX,\mL)\rightarrow C$ such that the generic fibre $\mX_η$ is a klt Q-Fano variety and $\mL|_{\mX_η}\sim_{Q}-K_{X_η}$, we use the techniques from the minimal model program (MMP) to modify the total family. The end product is a family such that every fiber is a klt Q-Fano variety. Moreover, we can prove that the Donaldson-Futaki invariants of the appearing models decrease. When the family is a test configuration of a fixed Fano variety $(X,-K_X)$, this implies Tian's conjecture: given $X$ a Fano manifold, to test its K-(semi, poly)stability, we only need to test on the special test configurations.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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