167 citations · 448 across the 34 of their papers we have counts for
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A reciprocal Wald theorem for varying gravitational function
Stephane Fay
We study when a cosmological constant is a natural issue if it is mimicked by the potential of a massive Hyperextended Scalar Tensor theory with a perfect fluid for Bianchi type I…
Isotropisation of Bianchi class A models with curvature for a minimally coupled scalar tensor theory
Stephane Fay
We look for necessary isotropisation conditions of Bianchi class models with curvature in presence of a massive and minimally coupled scalar field when a function of the…
Isotropisation of the minimally coupled scalar-tensor theory with a massive scalar field and a perfect fluid in the Bianchi type I model
Stephane Fay
We look for necessary conditions such that minimally coupled scalar-tensor theory with a massive scalar field and a perfect fluid in the Bianchi type I model isotropises. Then we d…
Isotropisation of Generalized Scalar-Tensor theory plus a massive scalar field in the Bianchi type I model
Stephane Fay
In this paper we study the isotropisation of a Generalized Scalar-Tensor theory with a massive scalar field. We find it depends on a condition on the Brans-Dicke coupling function…
Exact solutions of the Hyperextended Scalar Tensor theory with potential in the Bianchi type I model
Stephane Fay
The Hyperextended Scalar Tensor theory with a potential is defined by three free functions: the gravitational function, the Brans-Dicke coupling function and the potential. Startin…
Noether Symmetry of the Hyperextended Scalar Tensor theory for the FLRW models
Stephane Fay
We study in which conditions the Hyperextended Scalar Tensor theory in an FLRW background admits a Noether symmetry and derive the vectors field generating it.