HANDLE DECOMPOSITIONS OF RATIONAL HOMOLOGY BALLS AND CASSON-GORDON INVARIANTS

被引:6
|
作者
Aceto, Paolo [1 ]
Golla, Marco [2 ,3 ]
Lecuona, Ana G. [4 ]
机构
[1] Max Planck Inst Math, Bonn, Germany
[2] Univ Oxford, Math Inst, Oxford, England
[3] Univ Nantes, CNRS, Lab Math Jean Leray, Nantes, France
[4] Aix Marseille Univ, CNRS, Cent Marseille, I2M, Marseille, France
基金
欧洲研究理事会;
关键词
KNOTS; SINGULARITIES; SURFACES; SURGERY;
D O I
10.1090/proc/14035
中图分类号
O29 [应用数学];
学科分类号
070104 ;
摘要
Given a rational homology sphere which bounds rational homology balls, we investigate the complexity of these balls as measured by the number of 1-handles in a handle decomposition. We use Casson-Gordon invariants to obtain lower bounds which also lead to lower bounds on the fusion number of ribbon knots. We use Levine-Tristram signatures to compute these bounds and produce explicit examples.
引用
收藏
页码:4059 / 4072
页数:14
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