The Friedmann–Lemaître–Robertson–Walker metric (FLRW; /ˈfriːdmən ləˈmɛtrə ... /) is a metric that describes a homogeneous, isotropic, expanding (or otherwise...

derived by Alexander Friedmann in 1922 from Einstein's field equations of gravitation for the Friedmann–Lemaître–Robertson–Walker metric and a perfect fluid...

called the Friedmann–Lemaître–Robertson–Walker metric, or FLRW, after Friedmann, Georges Lemaître, Howard P. Robertson and Arthur Geoffrey Walker, who worked...

In physics, the Lemaître–Tolman metric, also known as the Lemaître–Tolman–Bondi metric or the Tolman metric, is a Lorentzian metric based on an exact...

cosmology. It can be modeled mathematically with the Friedmann–Lemaître–Robertson–Walker metric (FLRW), where it corresponds to an increase in the scale...

Hubble–Lemaître law. The lunar crater Lemaître Friedmann–Lemaître–Robertson–Walker metric Lemaître coordinates Lemaître–Tolman metric Hubble–Lemaître law...

cosmological principle and assumed by all models that use the Friedmann–Lemaître–Robertson–Walker metric, including the current version of the ΛCDM model, or is...

Raj Pathria, who compared the Schwarzschild metric with the closed Friedmann–Lemaître–Robertson–Walker metric at the maximum scale factor. Subsequent studies...

wherever you are." This cosmological principle allows a metric, Friedmann–Lemaître–Robertson–Walker metric, to be derived and developed into a theory to compare...

evolution of the scale factor in the Friedmann–Lemaître–Robertson–Walker metric is obtained solving the Friedmann equations: a ( t ) ∝ t 1 / 2 . {\displaystyle...

was emitted, we may first note that according to the Friedmann–Lemaître–Robertson–Walker metric, which is used to model the expanding universe, if we...

cosmological principle and assumed by all models that use the Friedmann–Lemaître–Robertson–Walker metric, including the current version of the ΛCDM model, or is...

the cosmological principle is correct, is the Friedmann–Lemaître–Robertson–Walker metric the right metric to use for our universe? Are the observations...

matter) density of a substance and its pressure. In the Friedmann–Lemaître–Robertson–Walker metric, it can be shown that a strong constant negative pressure...

by Arthur Geoffrey Walker in 1936, and is today widely known in the United States as the Robertson–Walker metric. One of Robertson's landmark papers, a...

notable metrics are: Alcubierre metric, de Sitter/anti-de Sitter metrics, Friedmann–Lemaître–Robertson–Walker metric, Isotropic coordinates, Lemaître–Tolman...

computed by the following formula (derived using the Friedmann–Lemaître–Robertson–Walker metric): χ = ∫ t e t c d t ′ a ( t ′ ) {\displaystyle \chi =\int...

Lemaître: Lemaître (crater), an impact crater on the Moon 1565 Lemaître, a minor planet the Friedmann–Lemaître–Robertson–Walker metric the Lemaître metric...

equations that describes the universe is the metric tensor called the Friedmann–Lemaître–Robertson–Walker metric, d s 2 = − c 2 d t 2 + R ( t ) 2 ( d r 2...

constructed by Georges Lemaître and Alexander Friedmann all shared the same general form, the Robertson-Walker metric. They also showed that this was the most...

{1}{2}}\end{matrix}}\pi ^{2}R^{4}} This is part of the Friedmann–Lemaître–Robertson–Walker metric in General relativity where R is substituted by function...

without major pitfalls. In practice, some metrics, notably the Friedmann–Lemaître–Robertson–Walker metric that appears to govern the universe, do not...

\sum _{j=1}^{D-1}p_{j}^{2}={\frac {1}{D-1}}\neq 1.} The Friedmann–Lemaître–Robertson–Walker metric employed in cosmology, by contrast, is able to expand...

principle, as in the case for all models that use the Friedmann–Lemaître–Robertson–Walker metric, while there are other possible causes of an accelerating...

tensors not simply obtained from Killing vectors. The Friedmann–Lemaître–Robertson–Walker metric, widely used in cosmology, has spacelike Killing vectors...

cosmological constant dark energy dark matter de Sitter space Friedmann–Lemaître–Robertson–Walker metric horizon problem large-scale structure of the cosmos Randall–Sundrum...

calculated within the context of general relativity, where the Friedmann–Lemaître–Robertson–Walker solution is used to describe the universe. There are a few...

space-time with no appeal to homogeneity or isotropy. The Friedmann–Lemaître–Robertson–Walker metric is given by d s = d t 2 − a 2 ( t ) d x i d x i {\displaystyle...

is often visualized as curved spacetime. The Friedmann–Lemaître–Robertson–Walker metric is a curved metric which forms the current foundation for the description...

original positive energy theorem. List of spacetimes Friedmann–Lemaître–Robertson–Walker metric Petrov classification, for algebraic symmetries of the...