970 PONTIFICIAE ACADEMIAE SCIENTIARVM SCRIPTA VARIA - 28 
as 0 
In addition, three charts IX, X and XI are presented show- 
ing the functions § (8), ¢ (68) and 1e ® (8) dO in the three cases. 
The expressions for these functions are the following (1). 
Mode! 
Functions 
>(0) 
(0) 
[52 o(6) db 
1 
Exponential 
MWy=0 
1 _ 8 
0° © 
I .8 
ne © 
9 
a 
il 
Mixed 
III 
Para-exponential 
m=1/2 
W=1 
46 
8 2 eu 
(+25 a 
6 
4 — 
Se 
(A + B6) +6 
Sk 
mê 
A+ 2 pol” 14,20]. 
with 
a 
A ss 
90, (T-%7T,) 
(539-11) 
B___ © 
27 0 (1-4 Y) 
C= L[r 30,4 
ra 
YY Relations (251-2) for k=1, (251-3), (539-5), (539-6), (521-4) and 
521-6). 
1] Allais - pag. 274