Rasmussen invariant, Slice-Bennequin inequality, and sliceness of knots
Rasmussen invariant, Slice-Bennequin inequality, and sliceness of knots
复制标题
Rasmussen 不变量、Slice-Bennequin 不等式和结的切片度
DOI:
10.1142/s0218216507005889
复制
发表时间:
2004
期刊:
影响因子:
--
通讯作者:
A. Shumakovitch
中科院分区:
文献类型:
--
作者:
A. Shumakovitch
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.