Alexander-Conway polynomial

The Conway polynomial del _L(x), sometimes known as the Conway-Alexander polynomial, is a modified version of the Alexander polynomial Δ_L(x) that was formulated by J. H. Conway. It is a reparametrization of the Alexander polynomial given by Δ_L(x^2) = del _L(x - x^(-1)). The skein relationship convention used by for the Conway polynomial is del _(L_+)(x) - del _(L_-)(x) = x del _(L_0)(x) (Doll and Hoste 1991).