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arXiv 1606.04858math.AG
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关于三次曲线的两束

On two pencils of cubic curves

Pauline Bailet

摘要:

我们给出了两个例子的铅笔型的平面曲线安排是非常接近的线安排,虽然行动的单值算子的第一个上同调群的米尔诺纤维的特征值顺序为5和6,显示出令人惊讶的情况下,可以发生更大的类的曲线安排比线安排。我们的计算依赖于A. Dimca和G.检测自由曲线的非平凡monodromy特征空间的Sticlaru。

英文摘要:

We give two examples of plane curve arrangements of pencil type which are very close to line arrangements, though the action of the monodromy operator on the first cohomology group of the Milnor Fiber has eigenvalues of order 5 and 6, showing that surprising situations can occur for larger classes of curve arrangements than for line arrangements. Our computations rely on the algorithm given by A. Dimca and G. Sticlaru which detects the non trivial monodromy eigenspaces of free curves.

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