228 citations · 399 across the 17 of their papers we have counts for
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FLRW-Cosmology in Generic Gravity Theories
Metin Gurses, Yaghoub Heydarzade
We prove that for the Friedmann-Lemaitre-Robertson-Walker metric, the field equations of any generic gravity theory in arbitrary dimensions are of the perfect fluid type. The cases…
Is there a novel Einstein-Gauss-Bonnet theory in four dimensions?
Metin Gurses, Tahsin Cagri Sisman, Bayram Tekin
No! We show that the field equations of Einstein-Gauss-Bonnet theory defined in generic dimensions split into two parts one of which always remains higher dimensional, and he…
Nonlocal KdV Equations
Metin Gürses, Aslı Pekcan
Writing the Hirota-Satsuma (HS) system of equations in a symmetrical form we find its local and new nonlocal reductions. It turns out that all reductions of the HS system are Korte…
Superposition of FLRW Universes
Metin Gurses, Yaghoub Heydarzade, Bayram Tekin
We show that (1) the Einstein field equations with a perfect fluid source admit a nonlinear superposition of two distinct homogenous Friedman-Lemaitre-Robertson-Walker (FLRW) metri…