Metabelian SL(n,C) representations of knot groups IV: twisted Alexander   polynomials
  In this paper we will study properties of twisted Alexander polynomials of knots corresponding to metabelian representations. In particular we answer a question of Wada about the twisted Alexander polynomial associated to the tensor product of two representations, and we settle several conjectures of Hirasawa and Murasugi. 
Hans U. Boden and Stefan Friedl
math.GT