Linked from

The 16 pages that link to Friedmann–Lemaître–Robertson–Walker metric, each with the reason it gives.

• Cosmological principleRelated: This metric encodes the spatial symmetries assumed by the principle.

• Cosmological redshiftNarrower topic: Its changing spatial scale mathematically describes the expansion that stretches photons.

• Friedmann equationsRelated: This metric supplies the geometry assumed in their derivation.

• Peculiar velocityNarrower topic: Its expanding background supplies the smooth cosmic motion against which peculiar velocity is defined.

• Riemann curvature tensorBroader topic: Its curvature components encode the geometry of expanding cosmological models.

• Scale factorNarrower topic: Its time-dependent spatial part contains the scale factor.

• Alexander FriedmannRelated: It provides the geometric framework for the class of models Friedmann studied.

• Hubble parameterNarrower topic: Its scale factor provides the geometric quantity from which the Hubble parameter is defined.

• Cosmological horizonRelated: This standard cosmological geometry supplies the expansion history used to calculate horizon distances.

• Flatness problemRelated: It separates spatial curvature from the universe’s changing scale factor.

• Loop quantum cosmologyRelated: Its symmetries reduce cosmological dynamics to a small set of gravitational variables.

• Penrose–Hawking singularity theoremsRelated: These expanding cosmologies provide the setting motivating Hawking’s past-incompleteness results.

• 3-sphereRelated: Its positively curved spatial slices have the geometry of a 3-sphere.

• Primordial fluctuationsNarrower topic: Perturbations are defined as departures from this idealized cosmological background.

• Comoving and proper distancesRelated: Its spatial line element distinguishes comoving coordinates from physical distance.

• Mathematics of general relativityBroader topic: It reduces Einstein's equations to equations for cosmic expansion.