Umber Sheikh — Neckpinchhttps://neckpinch.com/authors/umber-sheikh/New arXiv papers by Umber Sheikh, from Neckpinch Tue, 10 Nov 2026 04:10:28 GMT Kinematic Description of Ricci Solitons in Fluid Spacetimeshttps://neckpinch.com/papers/1709.02138/arxiv:1709.02138Thu, 07 Sep 2017 00:00:00 GMTUmber Sheikh — We consider the kinematics of specific fluid spacetimes admitting timelike congruences of Ricci Solitons. These fluids includes string cloud, string fluid, perfect fluid, radially symmetric fluid, anisotropic fluid and relativistic magneto-fluid. Results are obtained and important physical aspects are discussed.Ricci solitonsRotational symmetry & warped products