350 PONTIFICIAE ACADEMIAE SCIENTIARVM SCRIPTA VARIA - 28 
ie. 
(531-4) 
mn. n 
Zu 2? 
2 
putting 
(531-5) 
po 
uO, 
The discussion can be summarised in the following table 
1) 
9 
U, 
ON 2 n 
© 
À. 
*7 
+ 
0 
where v, and v, are the values of v for which À = 1/2 and where 
(531-6) 
A _ (n+2)? 
mn 
We verify A,,>1/2 whatever the value of #n (}). 
Thus in every case we have 
(531-7) 
A 
-. 
(n+2) 
Qn 
(1) Condition (220-13). 
11] Allais - pag. 254