Generic immersions of curves, knots, monodromy and Gordian number

Generic immersions of curves, knots, monodromy and Gordian number
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曲线、结、单峰和戈尔迪数的通用沉浸

DOI:
10.1007/bf02701769
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发表时间:
1998
期刊:
Publications Mathématiques de l'Institut des Hautes Études Scientifiques
影响因子:
--
通讯作者:
N. A'campo
N. A'campo
中科院分区:
--
文献类型:
--
作者:
N. A'campo

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从分割开始,即在圆盘中有有限多个区间[0,1]的一般浸没,我们构造了3球中的一个经典连杆。我们证明了如果分割线是连通的,那么这个环上的互补纤维是连通的。此外,我们还从除法的组合论出发,计算了单异同态。我们在这个版本的论文中加入了关于除法的连杆的哥德数定理。一个除法的链路数等于该除法的双点数。
Starting from a divide, i.e. a generic immersion of finitely many copies of the interval [0,1] in the disk, we construct a classical link in the 3-sphere. We prove that the link's complement fibers over the circle, if the divide is connected. Moreover, we compute the monodromy diffeomorphism from the combinatorics of the divide. We added to this version of the paper the theorem about the gordian number of the link of a divide. The gordian number of the link of a divide equals the number of double points of the divide.