Hyperelliptic curves among cyclic coverings of the projective line, II

Hyperelliptic curves among cyclic coverings of the projective line, II
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投影线 II 的循环覆盖之间的超椭圆曲线

DOI:
10.1007/s00013-014-0609-5
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发表时间:
2013
期刊:
影响因子:
--
通讯作者:
F. Sakai
F. Sakai
中科院分区:
--
文献类型:
--
作者:
Nan Wangyu;F. Sakai

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本文证明了复射影直线的ad-循环覆盖具有2度的一个充要条件(即,是椭圆或超椭圆),其中是正整数。3个分支点的情形在我们以前的文章中已经解决了(见[3])。
In this note, we prove a necessary and sufficient condition for whether ad-cyclic covering of the complex projective line has gonality 2 (i.e., is elliptic or hyperelliptic), wheredis a positive integer. The case of 3 branch points has been solved in our previous paper (see [3]).