13 citations · 20 across the 3 of their papers we have counts for
3 papers
gr-qc2014★ 1 cited
Symmetry analysis of radiative spacetimes with a null isotropy using GHP formalism
S. Brian Edgar, Michael Bradley, M. Piedade Machado Ramos
A complete and simple invariant classification of the conformally flat pure radiation metrics with a negative cosmological constant that were obtained by integration using the gene…
gr-qc2006★ 6 cited
Obtaining a class of Type O pure radiation metrics with a cosmological constant, using invariant operators
S. Brian Edgar, M. P. Machado Ramos
Using the generalised invariant formalism we derive a class of conformally flat spacetimes whose Ricci tensor has a pure radiation and a Ricci scalar component. The method used is…
gr-qc2004★ 13 cited
Obtaining a class of Type N pure radiation metrics using invariant operators
M. P. Machado Ramos, S. Brian Edgar
We develop further the integration procedure in the generalised invariant formalism, and demonstrate its efficiency by obtaining a class of Petrov type N pure radiation metrics wit…