projective vector field on finsler spaces

The collection of all projective vector elds on a finsler space(m; f) is a nite-dimensional lie algebra with respect to the usual lie bracket,called projective algebra and is denoted by p(m; f). it is the lie algebra ofthe projective group p(m; f). after a short review of the denitions of ran-ders metric and projective vector eld. we show that for randers space withisotropic s-curvature and is not close, every ane vector eld is invariantane.