Abstract
We investigate Bianchi type I cosmological models for perfect fluid source with time-dependent cosmological term Λ. We explore the possibility of cosmological models assuming the expansion anisotropy (the ratio σ/θ of the shear scalar σ to the volume expansion θ) to be a function of average scale factor R. The resulting models begin with initial anisotropy and approach isotropy at late times. The models evolve with decelerating expansion and enters into accelerating phase for large values of t.
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