A note on Iitaka's conjecture C31 in positive characteristics
A note on Iitaka's conjecture C31 in positive characteristics
复制标题
关于饭鹰猜想C31的正特性的注解
DOI:
10.11650/tjm/7931
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发表时间:
2017
期刊:
影响因子:
--
通讯作者:
张磊
中科院分区:
文献类型:
--
作者:
张磊
Let 𝑓: 𝑋 →𝑌 be a fibration from a smooth projective 3-fold to a smooth projective curve, over an algebraically closed field 𝑘 of characteristic 𝑝 > 5. We prove that if the generic fiber 𝑋𝜂has big canonical divisor 𝐾𝑋𝜂thenκ(X)≥κ(Y)+κ(Xη).