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Friedmann model
[ freed-muhn ]
noun
, Astronomy.
- any model of the universe deduced from a homogeneous, isotropic solution of Einstein's field equations without a cosmological constant. Such models form the mathematical basis for many modern cosmologies and provide for expansion or contraction of the universe.
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Word History and Origins
Origin of Friedmann model1
Named after Alexander Friedmann, (1885–1925), Russian mathematician, who made the necessary calculations in 1922
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Example Sentences
In the first Friedmann model, space is just like this, but with three dimensions instead of two for the earth’s surface.
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In the first kind of Friedmann model, which expands and recollapses, space is bent in on itself, like the surface of the earth.
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But which Friedmann model describes our universe?
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A remarkable feature of the first kind of Friedmann model is that in it the universe is not infinite in space, but neither does space have any boundary.
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This assumes that the universe is described by a Friedmann model, right back to the big bang.
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