The autocorrelation function is plotted in figure 9. Exponential
decay is only observed for k less than about 
. Thereafter, 
oscillates aperiodically.
Figure 9: Normalised autocorrelation function 
for 
from a
network with M= 100 and 60% load. This graph provides evidence for
( a) generally slower-than-exponential decay of the autocorrelation function, and
( b) no obvious periodicites. The inset graph shows that the decay is
approximately exponential only for 
.