8 citations · 11 across the 4 of their papers we have counts for
4 papers
Shear-free perfect fluids with a barotropic equation of state in general relativity: an update and a new formalism
Norbert Van den Bergh
The present status of the shear-free perfect fluid conjecture in general relativity is discussed: I give a review of recent work and present a new formalism which may provide a bet…
Comment on "Shear-free barotropic perfect fluids cannot rotate and expand simultaneously" by R. Goswami and G.F.R. Ellis
Norbert Van den Bergh, John Carminati
We point out an error in a recent paper by Goswami and Ellis. As a consequence the question of whether shear-free barotropic perfect fluids (with ) can or cannot rotate…
Algebraically special Einstein-Maxwell fields
Norbert Van den Bergh
The Geroch-Held-Penrose formalism is used to re-analyse algebraically special non-null Einstein-Maxwell fields, aligned as well as non-aligned, in the presence of a possible non-va…
Shear-free perfect fluids with a barotropic equation of state in general relativity: the present status
Norbert Van den Bergh, Radu Slobodeanu
The present status of the shear-free fluid conjecture in general relativity is discussed: a review is given of recent partial proofs, a new and complete proof is given for the case…