Canal Hypersurfaces Generated by Pseudo Null, Partially Null and Null Curves in Lorentz-Minkowski 4-Space

In this paper, we obtain the parametric expressions of the canal hypersurfaces that are formed as the envelope of a family of pseudo hyperspheres or pseudo hyperbolic hyperspheres whose centers lie on a pseudo null, partially null or null curve in E₁⁴ and give some geometric invariants such as unit normal vector fields, Gauss-Kronecker curvatures and mean curvatures of the ones generated by pseudo null and partially null curves. Also, we construct some examples for these canal hypersurfaces and finally, we give some characterizations for tubular hypersurfaces in E₁⁴.