Comment on Ricci Collineations for type B warped space-times
arXiv:gr-qc/9910028 · doi:10.1023/A:1001931409928
Abstract
We present two counterexamples to the paper by Carot et al. in Gen. Rel. Grav. 1997, 29, 1223 and show that the results obtained are correct but not general.
LaTex, 3 pages, Eq. (9) and reference added, typos corrected; Gen. Rel. Grav (to appear)