Erratum to the article Twisted Alexander polynomials and surjectivity of a group homomorphism

Abstract

We prove the nonexistence of surjective homomorphisms from knot groups $G\left(8_{21}\right)$, $G\left(9_{12}\right)$, $G\left(9_{24}\right)$, $G\left(9_{39}\right)$ onto $G\left(4_1\right)$ using twisted Alexander polynomials and the numbers of surjective homomorphisms onto $SL\left(2;\mathbb{Z}∕7\mathbb{Z}\right)$.