Friedman Equation
•Homogeneous and Isotropic
universe is described geometrically by a metric, or line element,
in GR, for “pressureless dust”.
•Einstein field equations yield
the Friedman Equation (no cosmological constant):
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•Term on left is Hubble
parameter: or H =
1/R(dR/dt), and k is the curvature term from the R-W metric (-1,0, or
+1)
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