Uniformity of singular value exponents for typical cocycles.

Let be a G L d (ℝ) -valued cocycle over a subshift of finite type. Under a certain twisting assumption, we prove that has a uniform Lyapunov exponent if and only if the largest Lyapunov exponent of at all periodic points equals. Under the typicality assumption, we give two checkable criteria for deciding whether has uniform singular value exponents. [ABSTRACT FROM AUTHOR]