| Evolution and Constraint Equations F(R,G) Cosmologies
We consider within the class of higher-order gravity theories the so called -gravity where R is the Ricci curvature scalar, and G is the Gauss-Bonnet term defined as , and being the Ricci and Riemann curvature tensors, respectively. Making use of the effective fluid description, we extend to the -cosmology the (1+3)-covariant cosmological evolution and constraint equations of the conventional Relativistic Cosmology. As an illisturation of their use, we discuss the existence of the static Einstein Universe and we find that -gravity does not admit such a solution, although -gravity does.
YILMAZ Derya
Tez Adı : Yüksek Mertebeden Eğrilikli Gravitasyonda Dönmesiz Modeller
Danışman : Prof. Dr. Haşim MUTUŞ
Anabilim Dalı : Fizik
Programı : Matematiksel Fizik
Mezuniyet Yılı : Mayıs, 2013
Tez Savunma Jürisi : Prof. Dr.Haşim MUTUŞ
Prof. Dr. K. Gediz AKDENİZ
Prof. Dr. Hasan TATLIPINAR
Doç. Dr. Kubilay BALCI
Yard. Doç.Dr. Ertan GÜDEKLİ
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