177 citations · 1.3k across the 24 of their papers we have counts for
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gr-qc2017★ 25 cited
The Early-time Cosmology with Stiff Era from Modified Gravity
S. D. Odintsov, V. K. Oikonomou
In this work, we shall incorporate a stiff era in the Universe's evolution in the context of gravity. After deriving the vacuum gravity, which may realize a stiff evo…
gr-qc2017★ 58 cited
Ghost-Free Gravity with Lagrange Multiplier Constraint
S. Nojiri, S. D. Odintsov, V. K. Oikonomou
We propose two new versions of ghost-free generalized gravity with Lagrange multiplier constraint. The first version of such theory for a particular degenerate choice of the…
gr-qc2017★ 74 cited
Phase Space Analysis of the Accelerating Multi-fluid Universe
S. D. Odintsov, V. K. Oikonomou, Petr V. Tretyakov
We study in detail the phase space of a Friedmann-Robertson-Walker Universe filled with various cosmological fluids which may or may not interact. We use various expressions for th…