عنوان	Some Results On 3-Dimensional Lorentzian Manifold
نوع پژوهش	مقاله چاپ شده
کلیدواژه‌ها	Killing vector, Lorentzian manifold, Szabo operator, Walker manifold
چکیده	In this paper, first Szabo operator related to the Ricci operator of Lorentzian 3-manifold in the algebraic setting is determined. Then, a necessary and sufficient condition for a Lorentzian 3-manifolds admitting a parallel line field with vanishing Szabo operator is obtained.
پژوهشگران	علی حاجی بدلی (نفر دوم)، سهراب عظیم پور (نفر اول)