Asked by qwerty

The equation describing the geometry and mass-energy distribution of a homogeneous and isotropic universe is known as:

- The Einstein Equation
- The Friedmann Equation
- The Robertson-Walker Equation
- The Hubble Equation
Answered by drwls
None of the above. Four have gotten into the act.

http://en.wikipedia.org/wiki/Friedmann%E2%80%93Lema%C3%AEtre%E2%80%93Robertson%E2%80%93Walker_metric
Answered by Anonymous
The Friedmann Equation
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