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gr-qc2013★ 15 cited
Asymptotic vacua with higher derivatives
Spiros Cotsakis, Seifedine Kadry, Georgios Kolionis +1
We study limits of vacuum, isotropic universes in the full, effective, four-dimensional theory with higher derivatives. We show that all flat vacua as well as general curved ones a…
gr-qc2012★ 13 cited
The regular state in higher-order gravity
Spiros Cotsakis, Seifedine Kadry, Dimitrios Trachilis
We consider the higher-order gravity theory derived from the quadratic lagrangian in vacuum as a first-order (ADM-type) system with constraints, and build time development…