Wall crossing for K-moduli spaces of plane curves.
Wall crossing for K-moduli spaces of plane curves.
复制标题
平面曲线 K 模空间的壁交叉。
DOI:
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发表时间:
2019
期刊:
影响因子:
--
通讯作者:
Yuchen Liu
中科院分区:
文献类型:
--
作者:
Kenneth Ascher;Kristin Devleming;Yuchen Liu
We construct proper good moduli spaces parametrizing K-polystable $\mathbb{Q}$-Gorenstein smoothable log Fano pairs $(X, cD)$, where $X$ is a Fano variety and $D$ is a rational multiple of the anti-canonical divisor. We then establish a wall-crossing framework of these K-moduli spaces as $c$ varies. The main application in this paper is the case of plane curves of degree $d \geq 4$ as boundary divisors of $\mathbb{P}^2$. In this case, we show that when the coefficient $c$ is small, the K-moduli space of these pairs is isomorphic to the GIT moduli space. We then show that the first wall crossing of these K-moduli spaces are weighted blow-ups of Kirwan type. We also describe all wall crossings for degree 4,5,6, and relate the final K-moduli spaces to Hacking's compactification and the moduli of K3 surfaces.
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