Commun. Korean Math. Soc. 2018; 33(2): 591-604
Online first article March 9, 2018 Printed April 1, 2018
https://doi.org/10.4134/CKMS.c170222
Copyright © The Korean Mathematical Society.
Taizo Kanenobu, Toshio Sumi
Osaka City University, Kyushu University
We consider a family of ribbon $2$-knots with trivial Alexander polynomial. We give nonabelian $SL(2, \C)$-representationsfrom the groups of these knots, and then calculate the twisted Alexander polynomials associated to these representations, which allows us to classify this family of knots.
Keywords: ribbon 2-knot, Alexander polynomial, knot group, twisted Alexander polynomial
MSC numbers: Primary 57Q45; Secondary 57M05
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