Normal affine surfaces with C*-actions
Normal affine surfaces with C*-actions
复制标题
具有 C* 作用的法线仿射曲面
DOI:
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发表时间:
2003
期刊:
影响因子:
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通讯作者:
M. Zaidenberg
中科院分区:
文献类型:
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作者:
H. Flenner;M. Zaidenberg
A classification of normal affine surfaces admitting a $f C^*$-action was given in the work of Bia{l}ynicki-Birula, Fieseler and L. Kaup, Orlik and Wagreich, Rynes and others. We provide a simple alternative description of such surfaces in terms of their graded rings as well as by defining equations. This is based on a generalization of the Dolgachev-Pinkham-Demazure construction in the case of a hyperbolic grading. As an apllication we determine the structure of singularities, of the orbits and the divisor class groups for such surfaces.