The end curve theorem for normal complex surface singularities

The end curve theorem for normal complex surface singularities
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正常复曲面奇点的端曲线定理

DOI:
10.4171/jems/206
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发表时间:
2008
影响因子:
2.6
通讯作者:
J. Wahl
J. Wahl
中科院分区:
数学1区
文献类型:
--
作者:
W. Neumann;J. Wahl

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我们证明了“末端曲线定理”,该定理指出,具有有理同源球面链接 6 的法向表面奇点 .X;o/ 是剪接商奇点,当且仅当它对于良好分辨率树的每个叶子都具有末端曲线函数。 “结束曲线函数”是一个解析函数.X;o/! .C; 0/,其零集在由对应于给定叶子的异常曲线的子午线给出的结中与6相交。 “剪接商奇点”.X;o/ 是通过给出一组显式方程来描述的,该方程组将其通用交换覆盖描述为 C t 中的完全交集,其中 是 .X;o/ 的分辨率图中的叶数,以及覆盖变换群的显式描述。端曲线定理的直接后果包括先前已知的结果:.X;o/ 是一个剪接商,如果它是加权齐次的(Neumann 1981),或者是有理的或最小椭圆的(Okuma 2005)。
We prove the "End Curve Theorem," which states that a normal surface singularity .X;o/ with rational homology sphere link 6 is a splice quotient singularity if and only if it has an end curve function for each leaf of a good resolution tree. An "end curve function" is an analytic function .X;o/! .C; 0/ whose zero set intersects 6 in the knot given by a meridian curve of the exceptional curve corresponding to the given leaf. A "splice quotient singularity".X;o/ is described by giving an explicit set of equations describ- ing its universal abelian cover as a complete intersection in C t , wheret is the number of leaves in the resolution graph for.X;o/, together with an explicit description of the covering transformation group. Among the immediate consequences of the End Curve Theorem are the previously known results: .X;o/ is a splice quotient if it is weighted homogeneous (Neumann 1981), or rational or minimally elliptic (Okuma 2005).
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发表时间: 2008
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影响因子: --
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