95 citations · 625 across the 35 of their papers we have counts for
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Spatially inhomogeneous and irrotational geometries admitting Intrinsic Conformal Symmetries
Pantelis S. Apostolopoulos
"Diagonal" spatially inhomogeneous (SI) models are introduced under the assumption of the existence of (proper) intrinsic symmetries and can be seen, in some sense, complementary t…
Intrinsic Conformal Symmetries in Szekeres models
Pantelis S. Apostolopoulos
We show that Spatially Inhomogeneous (SI) and Irrotational dust models admit a \emph{6-dimensional algebra } of \emph{Intrinsic Conformal Vector Fields} (ICVFs) sa…
Szekeres models: a covariant approach
Pantelis S. Apostolopoulos
We exploit the 1+1+2 formalism to covariantly describe the inhomogeneous and anisotropic Szekeres models. It is shown that an \emph{average scale length} can be defined \emph{covar…
Vacuum self similar anisotropic cosmologies in gravity
Pantelis S. Apostolopoulos
The implications from the existence of a proper Homothetic Vector Field (HVF) on the dynamics of vacuum anisotropic models in gravitational theory are studied. The fact that…