ABGR
is easier to compute than FSLE, but they both converge to the
Lyapunov
exponent for infinitesimal amplitudes and intervals
Boffetta
et al (1998) used a coupled fast/slow Lorenz model to show
that
the predictability is a function of the
tolerance
Δ,
and for small amplitude
fast
modes, predictability is larger than
the
Lyapunov estimation