Surfaces in a strict Walker 3-manifold that contain non-null curves with zero torsion

El Hadji Baye Camara, Athoumane Niang, Ameth Ndiaye +1

Given a non-null curve ${\hat{I}}^3$ in a strict Walker 3-manifold, first we show that (locally) ${\hat{I}}^3$ lies in a flat cylinder with a null axis. Secondly, we construct an example of such a c…