Artin复曲面栈的良模空间的部分去奇异化
Partial desingularizations of good moduli spaces of Artin toric stacks
摘要:
我们定义Reichstein变换为具有良好模空间的Artin栈的某些双有理变换。我们的主要技术结果是,Reichstein变换的阿丁复曲面堆栈是再次阿丁复曲面堆栈。这导致了我们的主要定理,其中指出,对于阿廷复曲面堆栈有一个规范序列的Reichstein变换产生一个德利涅-芒福德复曲面堆栈。当一个Artin复曲面栈的好模空间是射影的时候,我们的过程可以用Kirwan的几何不变理论的部分去奇异化来解释。
英文摘要:
We define Reichstein transforms to be certain birational transformations of Artin stacks with good moduli spaces. Our main technical result is that the Reichstein transform of an Artin toric stack is again an Artin toric stack. This leads to our main theorem which states that for Artin toric stacks there is a canonical sequence of Reichstein transforms which produces a Deligne-Mumford toric stack. When the good moduli space of an Artin toric stack is projective our procedure can be interpreted in terms of Kirwan's partial desingularization of geometric invariant theory quotients.
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