we study umbilic (space-like) submanifolds of pseudo-riemannian space forms, then define totally semi-umbilic space-like submanifold of pseudo euclidean space and relate this notion to umbilicity. finally we give characterization of total semi-umbilicity for space-like submanifolds contained in pseudo sphere or pseudo hyperbolic space or the light cone.a pseudo-riemannian submanifold m in (a ps...

ahmed mahmud is one of the most prominent iranian writers in recent decades. he began his work with writing the short story entitled “sob mishe” and continued with” mool”. he received a position among top rank writers with writing the novel  hamsayeha. many critics have criticized  and studied his works and often dealt with the content of his stories. the paper first addresses form and structur...