Friedmann model

[ freed-muhn ]

noun

, Astronomy.

1. 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.

Word History and Origins

Origin of Friedmann model¹

Named after Alexander Friedmann, (1885–1925), Russian mathematician, who made the necessary calculations in 1922