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Structure of Fano fibrations of varieties admitting an int-amplified endomorphism
Advances in Mathematics ( IF 1.7 ) Pub Date : 2021-08-25 , DOI: 10.1016/j.aim.2021.107964 Shou Yoshikawa 1
中文翻译:
承认内部放大内同态的品种的 Fano 纤维结构
更新日期:2021-08-26
Advances in Mathematics ( IF 1.7 ) Pub Date : 2021-08-25 , DOI: 10.1016/j.aim.2021.107964 Shou Yoshikawa 1
Affiliation
In this paper, we study the structure of Fano fibrations of varieties admitting an int-amplified endomorphism. We prove that if a normal -factorial klt projective variety X has an int-amplified endomorphism, then there exists an étale in codimension one finite morphism such that is of Fano type over its Albanese variety. As a corollary, if we further assume that X is smooth and rationally connected, then X is of Fano type.
中文翻译:
承认内部放大内同态的品种的 Fano 纤维结构
在本文中,我们研究了允许内部放大自同态的品种的 Fano 纤维结构。我们证明如果一个正常的-阶乘 klt 射影簇X有一个整数放大的内同态,那么在余维一有限态射中存在一个 étale 以至于 在其 Albanese 品种上属于 Fano 类型。作为推论,如果我们进一步假设X是平滑且有理连接的,那么X是 Fano 类型的。