Navegação Centro de Física Fundamental (CFF) por autor "Contreras, Gerardo"
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Comment on Ricci Collineations of static spherically symmetric spacetimes
Núñez, Luis; Percoco, Umberto; Contreras, Gerardo; Bertolotti, Ricardo; Carot, Jaume (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 ... -
Ricci collineations for non-degenerate, diagonal and spherically symmetric ricci tensors
Núñez, Luis; Percoco, Umberto; Contreras, Gerardo (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 ...