Moduli spaces of weighted pointed stable rational curves via GIT
Moduli spaces of weighted pointed stable rational curves via GIT
复制标题
通过 GIT 的加权尖稳定有理曲线的模空间
DOI:
10.18910/7191
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发表时间:
2010
影响因子:
0.4
通讯作者:
Han
中科院分区:
文献类型:
--
作者:
Y. Kiem;Han
We construct moduli spaces of weighted pointed stable rational curves M0;n with symmetric weight data by the GIT quotient of moduli spaces of weighted pointed stable maps M0;n (P 1 ;1). As a consequence, we prove that the Knudsen-Mumford space M0;n of n-pointed stable rational curves is obtained by a sequence of explicit blow-ups from the GIT quotient (P 1 ) n ==SL(2) with respect to the symmetric linearization O(1; ;1). The intermediate blown-up spaces turn out to be M0;n for suitable ranges of . As an application, we provide a new unconditional proof of M. Simpson's Theorem about the log canonical models of M0;n.