21 citations · 40 across the 7 of their papers we have counts for
5 papers · 1 filter
Asymptotic structure and stability of spatially homogeneous space-times with a positive cosmological constant
Christian Lübbe, Filipe C. Mena
We investigate the future asymptotics of spatially homogeneous space-times with a positive cosmological constant by using and further developing geometric conformal methods in Gene…
Conformal scalar fields, isotropic singularities and conformal cyclic cosmologies
Christian Lübbe
We analyse spacetimes with a conformal scalar field source, a cosmological constant and a quartic self-interaction term for the scalar field. We also consider additional matter con…
The extended Conformal Einstein field equations with matter: the Einstein-Maxwell field
Christian Lübbe, Juan Antonio Valiente Kroon
A discussion is given of the conformal Einstein field equations coupled with matter whose energy-momentum tensor is trace-free. These resulting equations are expressed in terms of…
A Conformal Extension Theorem based on Null Conformal Geodesics
Christian Lübbe
In this article we describe the formulation of null geodesics as null conformal geodesics and their description in the tractor formalism. A conformal extension theorem through an i…
A global conformal extension theorem for perfect fluid Bianchi space-times
Christian Lübbe, Paul Tod
A global extension theorem is established for isotropic singularities in polytropic perfect fluid Bianchi space-times. When an extension is possible, the limiting behaviour of the…