Picard 数为二的射影簇的双有理自同构群
代数几何
2018-06-20 v2 动力系统
摘要
我们将 Oguiso 关于双有理或自同构群的结果(以及 Lazi\'c-Peternell 关于 Morrison-Kawamata 锥猜想的相应结果)从 Picard 数为二的 Calabi-Yau 流形略微推广到任意 Picard 数为二的奇异簇 X( resp. 广义上的 klt Calabi-Yau 对)。当 X 仅具有 klt 奇点且不是复环面时,我们证明 Aut(X) 要么是准循环的,要么仅具有有限多个连通分支。
引用
@article{arxiv.1307.5490,
title = {Birational automorphism groups of projective varieties of Picard number two},
author = {De-Qi Zhang},
journal= {arXiv preprint arXiv:1307.5490},
year = {2018}
}
备注
title slightly changed to this; some proof simplified; submitted to the Proceedings of Groups of Automorphisms in Birational and Affine Geometry, 28 October - 3 November 2012, C.I.R.M., Trento, Italy