How much damping?

Of some curiosity and significance is the numerical choice of $\epsilon$.The general theory says we need an epsilon, but does not say how much. Our low-pass filter approach in Chapter made it quite clear that $\epsilon$ is a filter cutoff which might better have been named $\omega_0$.We experimented with some objective tests for the correct value of $\omega_0$,a subject that we will return to later.