INFLATIONARY COSMOLOGY WITH A R-R(MU-NU)R(MU-NU)(LAMBDA)R LAGRANGIAN/

We consider an alternative fourth-order gravity Lagrangian which is no nanalytic in the Ricci scalar, and apply it to a Robertson-Walker metr ic. We find vacuum solutions which undergo power-law inflation. Once m atter is introduced the theory behaves very much like ordinary General Relativity, except that the radiation evolution a similar to root t i s not allowed since it corresponds to R = O. We comment on the possibi lity of wormhole solutions in such a theory.