On $$W_2$$W2-lifting of Frobenius of algebraic surfaces

On $$W_2$$W2-lifting of Frobenius of algebraic surfaces
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关于代数曲面的 Frobenius 的 $$W_2$$W2 提升

DOI:
10.1007/s13348-014-0130-y
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发表时间:
2013
影响因子:
1.1
通讯作者:
He Xin
He Xin
中科院分区:
数学2区
文献类型:
--
作者:
He Xin

文献摘要

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正特征最小代数曲面的分类是由 Bombieri 和 Mumford 在 20 世纪 70 年代完成的。在这项工作中,我们完全确定了哪些正特征的最小代数曲面允许将其 Frobenius 提升到长度为 2 的截断维特环上。此外,我们表明许多射影有理曲面的 Frobenius 态射不能提升到 $$W_2(k)$$W2(k)。
The classification of minimal algebraic surfaces in positive characteristics was accomplished by Bombieri and Mumford in the 1970s. In this work we decide completely which minimal algebraic surfaces in positive characteristics allow a lifting of their Frobenius over the truncated Witt rings of length 2. Besides, we show that the Frobenius morphism of many projective rational surfaces cannot be lifted to $$W_2(k)$$W2(k).