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Shear-free perfect fluids with a solenoidal electric curvature
journal contribution
posted on 2012-05-21, 00:00 authored by N Van den Bergh, John CarminatiJohn Carminati, H Karimian, Peter Anthony HufWe prove that the vorticity or the expansion vanishes for any shear-free perfect fluid solution of the Einstein field equations where the pressure satisfies a barotropic equation of state and the spatial divergence of the electric part of the Weyl tensor is zero.