OzsvthSzab and Rasmussen invariants of cable knots

OzsvthSzab and Rasmussen invariants of cable knots
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电缆结的 OzsvthSzab 和 Rasmussen 不变量

DOI:
10.2140/agt.2010.10.825
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发表时间:
2008
影响因子:
0.7
通讯作者:
C. V. Cott
C. V. Cott
中科院分区:
数学3区
文献类型:
--
作者:
C. V. Cott

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研究了Ozsvath-Szabo和Rasmussen纽结和谐不变量τ和s在K(m,n)上的行为,K(m,n)是纽结K的(m,n)-索,其中m和n是互质的.我们证明了,对于每个结K和任何固定的正整数m,K(m,n)上的两个不变量与它们在环面结T(m,n)上的值相差一个固定的常数,但n>0。将这个结果与Hedden关于tau在(m,mr+1)-cable上的行为的大量工作结合起来,得到了K的任何(m,n)-cable上的tau值的界限。此外,几个Hedden的电缆边界复杂的曲线的障碍进行了扩展。
We study the behavior of the Ozsvath-Szabo and Rasmussen knot concordance invariants tau and s on K(m,n), the (m,n)-cable of a knot K where m and n are relatively prime. We show that for every knot K and for any fixed positive integer m, both of the invariants evaluated on K(m,n) differ from their value on the torus knot T(m,n) by a fixed constant for all but finitely many n>0. Combining this result together with Hedden's extensive work on the behavior of tau on (m,mr+1)-cables yields bounds on the value of tau on any (m,n)-cable of K. In addition, several of Hedden's obstructions for cables bounding complex curves are extended.