n= 1000 
D(a) 
4000 
3200 
2400 
1600 
800 
-800 
-1600 
-2400 
-3200 
-4000 
100 
b2(a) 
400 
320 
240 
160 
80 
-80 
-160 
-240 
-320 
-400 
Fig 6 
20 
ae] ae 
32 
24 
aWaWaw ae .2 ee 
ote A Ae 
-24 
“32 
-40 
“1.0 =d} AS ~.4 =e. fe) -2 4 6 
-0.10 -.08 -.06 -04 -.02 fe) 02 .04 .06 
-0.01 -.008 -.006 -.004 -.02 ie) 002 004 .006 
a=0 
Graphs of b(a) for various values of n. Co-ordinate 
different n_ for 
differ for bottom graph as shown 
8 1.0 
-08 0.10 
008 0.01 
scales 
