Matter collineations of spacetime homogeneous G del-type metrics
Matter collineations of spacetime homogeneous G del-type metrics
The spacetime homogeneous Gödel-type spacetimes which have four classes of metrics are studied according to their matter collineations. The results obtained are compared with Killing vectors and Ricci collineations. It is found that these spacetimes have an infinite number of matter collineations in the degenerate case, i.e. det(Tab) = 0, …