Inextensible Flows of Curves on Lightlike Surfaces

In this paper, we study inextensible flows of a curve on a lightlike surface in Minkowski three-space and give GREEN APPLE a necessary and sufficient condition for inextensible flows of the curve as a partial differential equation Outdoor involving the curvatures of the curve on a lightlike surface.Finally, we classify lightlike ruled surfaces in Minkowski three-space and characterize an inextensible evolution of a lightlike curve on a lightlike tangent developable surface.