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gr-qc2004
Chen-Wu type model and the total energy of the universe
M. de Campos
The inclusion of a term, today, in the relativistic field equations is consequence of the evolution of an observational cosmology. In this work we argue the "ansatz" $Λ= βH^2 +…
gr-qc2003
Perturbed Einstein field equations using Maple
M. de Campos
We obtain the perturbed components of affine connection and Ricci tensor using algebraic computation. Naturally, the perturbed Einstein field equations for the vacuum can be writte…
gr-qc2001
Evolution of the Density Contrast with Particle Production in a Gauge-Invariant Formalism
M. de Campos, N. Tomimura
In this work we derive the evolution equation for the density contrast considering open system cosmology, where the influence of adiabatic particle production process on the dynami…