Extremal trigonal fibrations on rational surfaces
Extremal trigonal fibrations on rational surfaces
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有理面上的极值三角纤维化
DOI:
10.2969/jmsj/82438243
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发表时间:
2020-11
影响因子:
0.7
通讯作者:
Shinya Kitagawa
中科院分区:
文献类型:
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作者:
Cheng Gong;Jun Lu;Shinya Kitagawa
For a relatively minimal fibration f:X→P1 of non-hyperelliptic curves of genus g, we know the Picard number rho(X)≤3g+8. We study the case where rho(X)=3g+8 and the Mordell–Weil group of f is trivial. Such an f occurs only if g\equiv 0 or 1(mod3), and we describe such f:X→P1 explicitly.