Rasmussen invariant, Slice-Bennequin inequality, and sliceness of knots

Rasmussen invariant, Slice-Bennequin inequality, and sliceness of knots
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Rasmussen 不变量、Slice-Bennequin 不等式和结的切片度

DOI:
10.1142/s0218216507005889
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发表时间:
2004
期刊:
arXiv: Geometric Topology
影响因子:
--
通讯作者:
A. Shumakovitch
A. Shumakovitch
中科院分区:
--
文献类型:
--
作者:
A. Shumakovitch

文献摘要

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我们使用最近引入的Rasmussen不变量来寻找拓扑上局部平坦切片而非光滑切片的结。我们注意到这个不变量可以用来给出切片-班尼昆不等式的组合证明。最后,我们计算了拟正结的Rasmussen不变量,并表明我们的大多数非切片结的例子不是拟正的,并且据我们所知,以前是未知的。
We use recently introduced Rasmussen invariant to find knots that are topologically locally-flatly slice but not smoothly slice. We note that this invariant can be used to give a combinatorial proof of the slice-Bennequin inequality. Finally, we compute the Rasmussen invariant for quasipositive knots and show that most of our examples of non-slice knots are not quasipositive and, to the best of our knowledge, were previously unknown.