Abstract
We analyse the evolution of Bianchi type-VII h cosmological models during the lepton era and the subsequent adiabatic epochs. We find that these model cannot generally attain to the low-density regime with a reasonable anisotropy level because of a curvature—anisotropy coupling. The primordial damping due to neutrino viscosity, although very effective for the entropy production, cannot help to match to isotropy requirement at the present epoch.
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