Relation between the minimal Lorentz surfaces in $\mathbb R^4_2$ and $\mathbb R^3_1$

In this paper we give Weierstrass-type representation formulas for the null curves and for the minimal Lorentz surfaces in the Minkowski 3-space $\mathbb R^3_1$ using real-valued functions. Applying the Weierstrass-type representations for the null curves, we find a correspondence between the null curves in $\mathbb R^4_2$ and the pairs of null curves in $\mathbb R^3_1$. Based on this correspondence, we obtain a relation between the minimal Lorentz surfaces in $\mathbb R^4_2$ and the pairs of minimal Lorentz surfaces in $\mathbb R^3_1$.