The automorphism group of M̄g,n
The automorphism group of M̄g,n
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M̄g,n 的自同构群
DOI:
10.1112/jlms/jdt057
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发表时间:
2011
期刊:
影响因子:
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通讯作者:
Alex Massarenti
中科院分区:
文献类型:
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作者:
Alex Massarenti
Let ℳ¯g,n be the moduli stack parametrizing Deligne–Mumford stable n‐pointed genus g curves and let M¯g,n be its coarse moduli space: the Deligne–Mumford compactification of the moduli space of n‐pointed genus g smooth curves. We prove that the automorphism groups of ℳ¯g,n and M¯g,n are isomorphic to the symmetric group on n elements Sn for any g, n such that 2g − 2 + n ⩾ 3, and compute the remaining cases.