3 papers
gr-qc2000
Ever-expanding, Isotropizing, Quadratic Cosmologies
Spiros Cotsakis, George Flessas, Peter Leach +1
We consider some aspects of the global evolution problem of Hamiltonian homogeneous, anisotropic cosmologies derived from a purely quadratic action functional of the scalar curvatu…
gr-qc1999
Variational Principles and Cosmological Models in Higher-Order Gravity
Laurent Querella
This dissertation investigates three main topics, all of which dealing with alternative, higher-order gravity theories in four dimensions. Firstly, we study the variational and con…
gr-qc1998
Hamiltonian Formulation and Exact Solutions of Bianchi type-I Model in Conformal Gravity
Laurent Querella
We develop a Hamiltonian formulation of Bianchi type-I cosmological model in conformal gravity, i.e. the theory described by a Lagrangian which involves the quadratic curvature inv…