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  • ...in 1993, Eduard Tropp et al reported in Alexander A Friedmann, pp. 156-7, ?Friedmann formulates results of his first cosmological paper in just a few sentences:
    2 KB (253 words) - 19:25, 1 January 2017
  • ...that would prevent a finite universe from collapsing by gravity, Alexander Friedmann concluded an infinite number of models were possible. A model now establish
    1 KB (176 words) - 20:00, 1 January 2017
  • ...expansion of the universe. (According to Russian mathematician Alexander Friedmann (1888-1925), Einstein's ''chronotope'' is possible of both expansion and c
    5 KB (820 words) - 19:13, 1 January 2017
  • ...Alexander Friedmann]] who published a set of equations, now known as the [[Friedmann equations]], showing that the universe might expand, and presenting the exp In 1922, [[Alexander Friedman]]n derived his [[Friedmann equations]] from [[Einstein field equations|Einstein's field equations]], s
    62 KB (9,085 words) - 20:13, 4 February 2018