初等收缩均为光滑 $\mathbb P^1$-纤维化的 Fano 流形:旗簇的几何刻画
代数几何
2017-09-29 v3
摘要
本文给出了半单代数群的完备旗簇的几何刻画。具体而言,若 是一个 Fano 流形,且其所有初等收缩均为 -纤维化,则 同构于完备旗流形 ,其中 为半单李代数群, 为 的 Borel 子群。
引用
@article{arxiv.1407.3658,
title = {Fano manifolds whose elementary contractions are smooth $\mathbb P^1$-fibrations: A geometric characterization of flag varieties},
author = {Gianluca Occhetta and Luis E. Solá Conde and Kiwamu Watanabe and Jarosław A. Wiśniewski},
journal= {arXiv preprint arXiv:1407.3658},
year = {2017}
}
备注
30 pages, minor issues corrected. To appear in Annali della Scuola Normale Superiore di Pisa, Classe di Scienze