COSMOLOGICAL SOLUTION IN WESSON 5D THEORY OF GRAVITY

Cosmological solutions that obey the perfect fluid equation of state i n Wesson's gravitational theory are presented assuming that the fifth dimension subspace is also homogeneous and isotropic like the usual ho mogeneous isotropic cosmological model. It is shown that the scale fac tor scales as square-root t for the vanishing fifth component of the e nergy momentum tensor. The role of the fifth component as a cosmologic al constant is remarked. and an inflationary model is thus obtained.