Counterexamples to Fujita's conjecture on surfaces in positive characteristic
Counterexamples to Fujita's conjecture on surfaces in positive characteristic
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藤田正特征表面猜想的反例
DOI:
10.1016/j.aim.2022.108271
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发表时间:
2020-02
影响因子:
1.7
通讯作者:
Yongming Zhang
中科院分区:
文献类型:
--
作者:
Yi Gu;Lei Zhang;Yongming Zhang
We present counterexamples to Fujita's conjecture in positive characteristic. More precisely, given any algebraically closed field k of characteristic p> 0 and any positive integer m, we show there exists a smooth projective surface S over k admitting an ample Cartier divisor A such that the adjoint linear system| K S+ m A| is not free of base points.
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