String cosmology from a novel renormalization perspective

Abstract

We study small perturbations around the exactly marginal time-dependent string configuration of [1], and demonstrate the lack of the appropriate linearization. This implies that this configuration is an isolated fixed point of the ${\alpha }^{{}^{\prime }}$ flow in the pertinent space of theories.

Comments: 6 pages LaTeX, ammended version, includes modified discussion on linearisation about fixed point solution and arguments in favour of an `isolated fixed point'