**fBM1.swf:** Here are three histograms:

**(1)** Histogram of a (pseudo) fractional Brownian motion,

**(2)** Histogram of its 1st-differences,

**(3)** Histogram of its 2nd-differences,

whose Hurst exponent H varies from 0.2 to 1.

Observe the shapes of respective distributions. (53').

*(Note that the detrending by differentiation has an *

*
*important part to play in Statistics, in particular,

*in DS process).*