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hep-th2006★ 4 cited
Non-singular solutions in multidimensional cosmology with a perfect fluid: acceleration and variation of G
V. D. Ivashchuk, S. A. Kononogov, V. N. Melnikov +1
Exact solutions with an exponential behaviour of the scale factors are considered in a multidimensional cosmological model describing the dynamics of n+1 Ricci-flat factor spaces M…
hep-th2003★ 1 cited
Causality and charged spin-2 fields in an electromagnetic background
M. Novello, S. E. Perez Bergliaffa, R. P. Neves
We show that, contrary to common belief, the propagation of a spin-2 field in an electromagnetic background is {\em causal}. The proof will be given in the Fierz formalism which, a…