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Ricci collineations for non-degenerate, diagonal and spherically symmetric ricci tensors
(SABER ULA, 2006-01-26)
Ricci collineations for non-degenerate, diagonal and spherically symmetric ricci tensors
(Núñez, Luis; Percoco, Umberto; Contreras, Gerardo)
Abstract
The expression of the vector field generator of a Ricci Collineation ...
Comment on Ricci Collineations of static spherically symmetric spacetimes
(SABER ULA, 2006-01-26)
Comment on Ricci Collineations of static spherically symmetric spacetimes
(Núñez, Luis; Contreras, Gerardo; Percoco, Umberto; Bertolotti, Ricardo; Carot, J.)
Abstract
We present a counter example to a theorem given ...