228 citations · 399 across the 17 of their papers we have counts for
18 papers
The Flat Critical Branch Between Nariai and Bertotti-Robinson Geometries as a Solution of Cosmological Einstein-Maxwell Theory
Metin Gurses, Tahsin Cagri Sisman, Bayram Tekin
We analyze a class of product geometries of the form supported by electric, magnetic, or dyonic flux in the Einstein-Maxwell- theory. These spacetim…
The Method of -Extension: The KdV Equation
Metin Gürses, Aslı Pekcan
In this work we generalize -extension that has been introduced recently. For illustration we use the KdV equation. We present five different -extensions…
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…