On the general structure of Ricci collineations for type B warped spacetimes
(Flores, J. L.; Parra, Yoan; Percoco, Umberto.)
Abstract

A complete study of the structure of Ricci collineations for type B warped spacetimes is carried out. This study can be used as a method to obtain these symetries in such spacetimes. Special cases as 2 + 2 reducible spacetimes, and plane and spherical symmetric spacetimes are considered specifically.