Automorphism group of planecurve computedby Galois points

Automorphism group of planecurve computedby Galois points
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伽罗瓦点计算的平面曲线自同构群

DOI:
10.1007/s13366-013-0181-3
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发表时间:
2014
期刊:
Beitr Algebra Geom
影响因子:
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通讯作者:
Ohbuchi,A.
Ohbuchi,A.
中科院分区:
--
文献类型:
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作者:
Satoru Fukasawa;Kei Miura;James Alexander and Tsunekazu Nishinaka;渡辺 敬一;Tsunekazu Nishinaka;Naoki Taniguchi;Ohbuchi,A.

文献摘要

相似文献

设为一条光滑的平面曲线,且为的所有内点和外点。比方说,每个伽罗瓦点确定一个伽罗瓦群。然后,根据伽罗瓦点的定义,伽罗瓦群的一个元素诱导出的二次变换。事实上,我们看到它变成了。我们称之为属于伽罗瓦点的自同构。然后,我们考虑由属于的所有Galois点的自同构生成的群。特别是,我们研究了和之间的差异,从而确定了的结构。
Letbe a smooth plane curve, andbe all inner and outer Galois points for. Each Galois pointdetermines a Galois group at, say. Then, by the definition of Galois point, an element of the Galois groupinduces a birational transformation of. In fact, we see that it becomes an automorphism of. We call this an automorphism belonging to the Galois point. Then, we consider the groupgenerated by automorphisms belonging to all Galois points for. In particular, we investigate the difference betweenand, so that we determine the structure of.