Full text: The collected mathematical papers of Arthur Cayley, Sc.D., F.R.S., late sadlerian professor of pure mathematics in the University of Cambridge (Vol. 12)

410 
NOTE SUE UN MÉMOIRE DE M. PICARD. 
[85 
On a d'abord un terme 21 4- T, où 
— 2 A + x 
21= X 
+ Y 
2 B+y 
dA dB dC 
dx dy dz 
dA dB dC 
dA dA dA\ 
— \x — + y , + z I 
dx ^ dy " r dz 
+ T — x 
dx 
dB 
dx 
dy dz ) 
dB dB 
+ y d( + *~s 
„ (dA dB dC\ ( dC 
+ Z -2C + z +^¡- +- [x-T- 
ou, en réduisant, 
\dx dy dz 
dG 
dC 
dx 
+ y dy + z dz 
Sl = —2 (AX + BY+CZ) 
+ (Xx + Yy + Zz) 
dA dB dC 
dx dy dz 
puis un terme 23 -4 T 2 , où 
-(m-3)(AX + BY+GZ) 
+ t i xd Î + rd Ê + z Zt 
= (m — 1) DT 
j, (dA dB dC dD\ 
\dx dy ^ dz + dt ) 
+ t ( x<! Ê + 7 lÊ +z W + T f)- 
ou, en réduisant, 
23 =-Z 
- Y 
-Z 
dT 
\ A y-B x) d ^-(Bz-Cy) d jp 
/d n \ dT . n dT 
(Bz~Cy)^-(Ga:-Az)- & 
33= s ,[(AX + BY + CZ)x-A(xX + yY + zZ)] 
+ ^[(AX + BY+CZ)y-B (xX + yY + zZ)} 
dT 
+ [{AX + BY + CZ) z — G (,xX + yY+ zZ)] 
= - BT 
dT dT dT\ 
x — + y j- + z 
dy 
dx 
dz) 
dT\ 
+ tT (A^ + B^+C-j-, 
dx dy dz J 
= — {m — 1) DT' 1 
+ Tt 
*%+*%+4f 
n dT\ 
+ D dt)-
	        
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