The Weierstrass gap sequences of the total ramification points of trigonal coverings of P1

The Weierstrass gap sequences of the total ramification points of trigonal coverings of P1
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P1 三角形覆盖总分叉点的 Weierstrass 间隙序列

DOI:
10.1016/1385-7258(85)90039-3
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发表时间:
1985
期刊:
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影响因子:
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通讯作者:
M. Coppens
M. Coppens
中科院分区:
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文献类型:
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作者:
M. Coppens

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设gE Zz3 并设C 为在C 上定义的亏格g 的平滑曲线。设f: C+ IP' 为三角覆盖(即3 次态射),设g: 为C 上的相关线性系统。因为gr 3,C 没有线性系统g:(克利福德定理-参见例如[5],IV 定理5.4),因此g: 是完备的。让德&.
Let gE Zz3 and let C be a smooth curve of genus g defined over C. Let f: C+ IP’be a trigonal covering (ie a morphism of degree 3) and let g: be the associated linear system on C. Because gr 3, C has no linear system g:(Clifford’s Theorem-see eg [5], IV Theorem 5.4) hence g: is complete. Let De&.