[5]- 



[6] 



[7] 



[8] 



\ 



PAR JEAN PLANA f) 



( t^=C,-i-aC i ^-c/'C i -hv.'C li -^ct i C i ; 



c, =x* h- 34 . x x x 4 x .+- 6 ( x 1 jt; -+- x; av ) 



-H 4 ( X X> -t- X 3 X 3 -+- X, X S J -4- X 5 X 3 3 ) 



■+■ i 2j,(I 1 i;+I 1 AV+I ( I,'+I s I l '+I > I,\>.V.\7,); 



t 



C, = X* -*■ 2 4 . X, I^ + Gf X, 1 z; -t- A, 1 X 2 ) 



+ 4 ( X x 3 -+- xx 3 ■+■ x 3 x 4 3 -+- x 4 x 3 ) 

 ■+■ . 2 .x(x 1 x 4 x+xx'-+-xx'-hxx 3 x : +-x 4 x j '-hx.\ 

 c 1 =x:-^2^x,x 1 x 3 x i ^6(x;x;-i-x;xn 

 + 4 ( x, x 3 -|- x x 1 -+- x x, 3 -h x 5 x 3 ) 

 +iz : xjx,x 3 % +x 5 x;+x i x;+x t x s % +x i x i x i +x,x, \ ) 



C, = AY -4- a4- X, X % X<X 5 + 6 ( X, 1 A? ■+- X/ X, 1 ) 

 -t.4(X,X % >+X,X s >+X<x/+X s X i i ) 



-f- . 2 .X 3 (X I X 4 , -4-XX, 1 -»-X3X 1 -»-X 4 X 1 -.-X 1 XX-HXX.X) ; 

 <$ ,al,»+ a4 . X, X X 4 X -4- 6 ( A? A? -+- X 1 X' ) 



-H 4 ( X, x 4 3 -+- X 3 X 3 -4- X 4 X 3 -4- X X 3 ) 

 -t-^.XXXX'^-XX^^X'-KXX'-HX.XX-t-XA \ i 



< 5 =e=n-t-«|'-i-<z 1 ?"-»-« 3 ?" , -»-«^' v . 



En faisant 



.... P= X, 3 (X X -*-X X 4 )-4-X 3 (X X -t-X X s ) 



-♦- x 3 ( x, x -+- x x ) -♦- x t 3 ( x, x -4- y, r, » 



-hX 3 (X, X 4 H-XX) ; 



.... q= x,(x; x* -h r s ' a? ) -+- v, ( x; x; -+- a; x,* » 

 -+- x ( X 1 x i -h x; x 1 ) + x 4 ( x, 1 .v/ ■+- w i 



-t-X^X.MV-hX'X 1 ) ; 

 Seme II. Tom. XVI. 



I 



