Danielewski–Fieseler surfaces

Danielewski–Fieseler surfaces
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Danielewski-Fieseler 曲面

DOI:
10.1007/s00031-005-1004-x
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发表时间:
2004
影响因子:
0.7
通讯作者:
A. Dubouloz
A. Dubouloz
中科院分区:
数学3区
文献类型:
--
作者:
A. Dubouloz

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本文研究了一类正规仿射曲面, 添加剂组操作,其中包含在 特别是A3中的Danielewski曲面 由方程xnz = P(y)给出,其中P是 具有简单根的非常数多项式。我们称 丹尼尔维斯基菲泽勒表面我们重新诠释 一个菲泽勒的结构, 这些表面看起来像是 曲线上线丛下的某些挠曲线 带有r折叠点。我们分类 Danielewski-Fieseler表面通过标记 在这样的表面上扎根的树木, 典型的方式。最后,我们描述了这些 具有平凡Makar-Limanov 在相关的树方面不变。
AbstractWe study a class of normal affine surfaces, with additive group actions, which contains in particular the Danielewski surfaces in A3 given by the equations xnz = P(y), where P is a nonconstant polynomial with simple roots. We call them Danielewski--Fieseler surfaces. We reinterpret a construction of Fieseler to show that these surfaces appear as the total spaces of certain torsors under a line bundle over a curve with an r fold point. We classify Danielewski-Fieseler surfaces through labelled rooted trees attached to such a surface in a canonical way. Finally, we characterize those surfaces which have a trivial Makar-Limanov invariant in terms of the associated trees.