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Archive for April, 2006

Testing Mathml

3  The Background Cosmology

We assume isotropy and homogeneity for the backgrond cosmology. Einstein's Equations are assumed to be true with a non-zero cosmological constant . The metric for the background cosmology is taken to be of the form (Standard Notation is used)

ds2 = dt2 -a(t )2 δμν dxμ dxν (1)
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