N. Syied — Neckpinchhttps://neckpinch.com/authors/n-syied/New arXiv papers by N. Syied, from Neckpinch Tue, 10 Nov 2026 04:10:28 GMT On symmetries of generalized Robertson-Walker Space-times and applicationshttps://neckpinch.com/papers/1606.08018/arxiv:1606.08018Sun, 26 Jun 2016 00:00:00 GMTH. K. El-Sayied, S. Shenawy, N. Syied — The purpose of the present article is to study and characterize sev- eral types of symmetries of generalized Robertson-Walker space-times. Con- formal vector fields, curvature and Ricci collineations are studied. Many im- plications for existence of these symmetries on generalied Robertson-Walker spacetimes are obtained. Finally, Ricci solitons on generalized Robertson- Walker space-times admitting conformal vector fields are investigated.Ricci solitons