Friedmann Equation. In this equation h is the hubble parameter expansion rate ρ is the average density of matter and energy in the universe s is the scale factor and k is a number that describes the overall curvature of the universe. This is a model that most cosmologists over 25 years ago thought was probably an excellent approximation to reality.
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The equations for negative. It indicates the future fate of the universe. They were first derived by alexander friedmann in 1922 from einstein s field equations of gravitation for the friedmann lemaître robertson walker metric and a perfect fluid with a given mass density ρ displaystyle rho and pressure p displaystyle p.
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They were first derived by alexander friedmann in 1922 1 from einstein s field equations of gravitation for the friedmann lemaître robertson walker metric and a fluid with a given mass density and pressure. In this equation h is the hubble parameter expansion rate ρ is the average density of matter and energy in the universe s is the scale factor and k is a number that describes the overall curvature of the universe. This is a model that most cosmologists over 25 years ago thought was probably an excellent approximation to reality. Most famous for contributions to cosmology.
