Şahin, BayramGündüzülalp, Yılmaz2021-02-102021-02-102010ŞAHİN B,GÜNDÜZÜLALP Y (2010). Submersion from semi-Riemannian manifolds onto lightlike manifolds. Hacettepe Journal of Mathematics and Statistics, 39(1), 41 - 53.1303-50102651-477Xhttps://hdl.handle.net/11616/19334https://search.trdizin.gov.tr/yayin/detay/98332Hacettepe Journal of Mathematics and Statistics Yıl: 2010Cilt: 39Sayı: 1ISSN: 1303-5010 / 2651-477XSayfa Aralığı: 41 - 53Metin Dili:İngilizceAbstract: In this paper, we introduce the idea of a lightlike submersion from a semi-Riemannian manifold onto a lightlike manifold, and give some examples. Then we define O’Neill’s tensors for such submersions and investigate their main properties. We show that the Schouten connection is not a metric connection in a lightlike submersion. We also investigate curvature properties of the manifolds and establish a relation between the null sectional curvatures of a semi-Riemannian manifold and a lightlike manifold.trinfo:eu-repo/semantics/openAccessArticle391415398332