The Friedmann–Lemaître–Robertson–Walker metric (FLRW; /ˈfriːdmən ləˈmɛtrə ... /) is a metric based on an exact solution of the Einstein field equations...

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

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

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

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

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...

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...

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

Alcubierre metric, de Sitter/anti-de Sitter metrics, Friedmann–Lemaître–Robertson–Walker metric, Isotropic coordinates, Lemaître–Tolman metric, Peres metric, Rindler...

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

horizon.[citation needed] The model uses the Friedmann–Lemaître–Robertson–Walker metric, the Friedmann equations, and the cosmological equations of state...

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...

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

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...

a Big Bounce, or a Big Crunch. Cosmological constant Friedmann–Lemaître–Robertson–Walker metric High-Z Supernova Search Team Lambda-CDM model List of...

( t ) {\displaystyle a(t)} is the scale factor of the Friedmann–Lemaître–Robertson–Walker metric, and we have taken the Big Bang to be at t = 0 {\displaystyle...

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

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...

Rosen's universe is zero in any universe compliant with a Friedmann–Lemaître–Robertson–Walker metric, and proposed a mechanism of inflation-driven generation...

\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...

kinematics of the observable universe, dependent on the Friedmann–Lemaître–Robertson–Walker metric but independent of the temporal dependence of the scale...

described as a cosmological model for a flat matter-only Friedmann–Lemaître–Robertson–Walker metric (FLRW) universe. In the model, Einstein and de Sitter...

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...

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

decomposition of the most general linearized perturbations of the Friedmann–Lemaître–Robertson–Walker metric into components according to their transformations under...

part of background metrics for some cosmological models; for example, the three cases of the Friedmann–Lemaître–Robertson–Walker metric may be represented...

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...

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...

In Einstein's theory of general relativity, the Schwarzschild metric (also known as the Schwarzschild solution) is an exact solution to the Einstein field...

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