Approximation of $Z_2$-cocycles and shift dynamical systems
Approximation of $Z_2$-cocycles and shift dynamical systems
n,+,, t >-0} be a subgroup of all roots of unity generated by exp(21ri/n, ), t >-0, and le_ t r: (X, B, ji) C) be an ergodic transformation with pure point spectrum G. Given a cocycle P , SO: X -Za , admitting an approximation with speed 0(l/nl+`, e …