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FLRW metric
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Definition/Summary
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| The Friedmann-Lemaitre-Robertson-Walker metric is an exact solution of the general theory of relativity, which describes and expanding, homogeneous and isotropic universe. |
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Equations
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The line element for the metric is
[tex]ds^2=-dt^2+\frac{dr^2}{1-kr^2}+a(t)^2\left(d\theta^2+\sin^2\theta d\phi^2\right)\,,[/tex]
where [itex](r,\theta,\phi)[/itex] are the usual radial and angular coordinates, [itex]t[/itex] is the time coordinate, [itex]a(t)[/itex] is the scale factor, and [itex]k[/itex] is the (spatial) curvature of the universe. |
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Recent forum threads on FLRW metric
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Breakdown
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Physics
> Astro Cosmo
>> Cosmology
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Extended explanation
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| Again, please feel free to edit.. maybe include general derivation of FLRW metric from assuming isotropy and homogeneity? |
Commentary
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