## Algebraic & Geometric Topology

### On the slice-ribbon conjecture for pretzel knots

Ana G Lecuona

#### Abstract

We give a necessary, and in some cases sufficient, condition for sliceness inside the family of pretzel knots $P(p1,…,pn)$ with one $pi$ even. The $3$–stranded case yields two interesting families of examples: The first consists of knots for which the nonsliceness is detected by the Alexander polynomial while several modern obstructions to sliceness vanish. The second family has the property that the correction terms from Heegaard–Floer homology of the double branched covers of these knots do not obstruct the existence of a rational homology ball; however, the Casson–Gordon invariants show that the double branched covers do not bound rational homology balls.

#### Article information

Source
Algebr. Geom. Topol., Volume 15, Number 4 (2015), 2133-2173.

Dates
Revised: 27 October 2014
Accepted: 31 October 2014
First available in Project Euclid: 16 November 2017

https://projecteuclid.org/euclid.agt/1510840999

Digital Object Identifier
doi:10.2140/agt.2015.15.2133

Mathematical Reviews number (MathSciNet)
MR3402337

Zentralblatt MATH identifier
1331.57012

#### Citation

Lecuona, Ana G. On the slice-ribbon conjecture for pretzel knots. Algebr. Geom. Topol. 15 (2015), no. 4, 2133--2173. doi:10.2140/agt.2015.15.2133. https://projecteuclid.org/euclid.agt/1510840999

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