arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1102.5730math.GT
收藏

纽结协调与同调配边

Knot concordance and homology cobordism

Tim D. Cochran, Bridget D. Franklin, Matthew Hedden, Peter D. Horn

摘要:

我们考虑这个问题:“如果三维球面中两个定向结点上的零框运算是整同调协边,保持正子午线的同调类,那么结点本身是一致的吗?“我们证明了这个问题在光滑范畴中有一个否定的答案,即使是拓扑切片结。为了证明这一点,我们首先证明了K上的零框架外科手术是Z-同源共边到它的许多卷绕数为1的卫星P(K)上的零框架外科手术。然后我们证明了在许多情况下K和P(K)的τ和s-不变量是不同的。因此,tau和s都不是零框架手术的光滑同调配边类的不变量。我们还表明,这个问题的一个自然理性的版本有一个否定的答案在拓扑和光滑的类别,通过证明类似的结果K和它的(p,1)-电缆。

英文摘要:

We consider the question: "If the zero-framed surgeries on two oriented knots in the 3-sphere are integral homology cobordant, preserving the homology class of the positive meridians, are the knots themselves concordant?" We show that this question has a negative answer in the smooth category, even for topologically slice knots. To show this we first prove that the zero-framed surgery on K is Z-homology cobordant to the zero-framed surgery on many of its winding number one satellites P(K). Then we prove that in many cases the tau and s-invariants of K and P(K) differ. Consequently neither tau nor s is an invariant of the smooth homology cobordism class of the zero-framed surgery. We also show, that a natural rational version of this question has a negative answer in both the topological and smooth categories, by proving similar results for K and its (p,1)-cables.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑