AGES OF THE UNIVERSE FOR FRW-TYPE MODELS IN WESSONS 5D VARIABLE MASS THEORY OF GRAVITY

The age of the universe is computed for spatially homogeneous and isot ropic cosmological models of the relativistic Wesson's 5D variable mas s theory of gravity. It is shown that if the pressure in the mass dime nsion is negligible, ages old enough to agree with the observations ca n only be obtained if the cosmological constant is different from zero , In addition, unlike the standard FRW models in Einstein's 4D theory, the age value itself is not affected by the nature of the matter cont ent (matter and radiation dominated models give the same age).