Khadekar, G. S.Kondawar, Gopal L.Özel, Cenap2021-06-232021-06-2320080020-77481572-9575https://doi.org/10.1007/s10773-007-9629-2https://hdl.handle.net/20.500.12491/6255The field equations with variable cosmological and gravitational constants are consider in the presence of perfect fluid for Kaluza-Klein type cosmological model. The exact solutions of the field equations are obtained by using the gamma law equation of state p = (gamma - 1)rho in which the parameter gamma depends on scale factor R. The functional form of gamma(R) is used to analyze a wide range of cosmological solution at early universe for two phases in cosmic history: inflationary phase and radiation dominated phase. The corresponding physical interpretation of cosmological solution are also discussed in the framework of higher dimensional space time.eninfo:eu-repo/semantics/closedAccessEarly UniverseGravitational and Cosmological ConstantsArticle10.1007/s10773-007-9629-247718441852WOS:000256521400007Q3