Null W-slant helices in E13

In this paper, we give the necessary and sufficient conditions for null curves in E13 to be W-slant helix in terms of their curvature functions. Mainly, throughout this paper relationships between the null W-slant helices and their pseudo spherical images are obtained. Furthermore, some illustrative examples of the null W-slant helices and their pseudo spherical indicatrices in E13 are demonstrated.