Re: Good enough for crypto?

Mok-Kong Shen wrote:
> 

> What I find difficult to understand is 'Also by inspection,
> ...'. What do you mean by that? In the 'theorectically'
> defined case ACF is 1.0 at origin but elsewhere 'exactly'
> zero (not converging to zero!). If you consider a practical
> case, then one could conceive that ACF is not 1.0 at
> the origin but elsewhere has some very tiny fluctuations.
> There is no inherent reason why that fluctuation has
> to absolutely vanish at large lags in my view. (Could you
> give math details to support you claim?)

Sorry, should read 'that ACF is 1.0 at the origin'.

M. K. Shen