CHINESE JOURNAL OF PHYSICS VOL. 40, NO. 6 DECEMBER 2002

Force Behaviour in the Radiation-Dominated Friedmann Universe

M. Sharif

Department of Mathematics, Punjab University,

Quaid-i-Azam Campus, Lahore-54590, Pakistan
(Received January 28, 2002)

We consider the radiation-dominated Friedmann universe and evaluate its force four-vector and momentum. We analyse and compare our results with those obtained previously by using the matter-dominated Friedmann model.

PACS. 04.20.Cv - Fundamental problems and general physically formalism.

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