80 citations · 112 across the 7 of their papers we have counts for
8 papers
Oscillatory singularities in Bianchi models with magnetic fields
Stefan Liebscher, Alan D. Rendall, Sophonie Blaise Tchapnda
An idea which has been around in general relativity for more than forty years is that in the approach to a big bang singularity solutions of the Einstein equations can be approxima…
On the spherically symmetric Einstein-Yang-Mills-Higgs equations in Bondi coordinates
Calvin Tadmon, Sophonie Blaise Tchapnda
We revisit and generalize, to the Einstein-Yang-Mills-Higgs system, previous results of D. Christodoulou and D. Chae concerning global solutions for the Einstein-scalar field and t…
Plane-symmetric spacetimes with positive cosmological constant. The case of stiff fluids
Philippe G. LeFloch, Sophonie B. Tchapnda
We consider plane-symmetric spacetimes satisfying Einstein's field equations with positive cosmological constant, when the matter is a fluid whose pressure is equal to its mass-ene…
The plane symmetric Einstein-dust system with positive cosmological constant
S. B. Tchapnda
The Einstein equations with a positive cosmological constant are coupled to the pressureless perfect fluid matter in plane symmetry. Under suitable restrictions on the initial data…
On surface-symmetric spacetimes with collisionless and charged matter
Sophonie Blaise Tchapnda
Some future global properties of cosmological solutions for the Einstein-Vlasov-Maxwell system with surface symmetry are presented. Global existence is proved, the homogeneous spac…
Structure of solutions near the initial singularity for the surface-symmetric Einstein-Vlasov system
Sophonie Blaise Tchapnda
Results on the behaviour in the past time direction of cosmological models with collisionless matter and a cosmological constant are presented. It is shown that under the assum…