3^6 E r)"oviDio 



{ff )y. = «,/' K' h;- 2 (/, f%, {xy) - J^ (/; f'y-^,{xyy--l {f.f)\{xyY 



{ff')y. = ajh^l; - I (/; /■'),, ixy) - f^ (f, f%, {xyY 



- 1 (/; f'ry. i^yY-fi if, f'YyixyY- 1 {fj'f {xyY=... , 



( rny. = aj b;- 3 (/; /■%, (xy) - J-f (y^, f%, {xyf - ^ (/•, f')\, {xyf 



- % {f^ f'Yy. {^pY - 1-4 (/; f% M'- \ {f, m^yY = . . • 



Ordini 8, 6. 



(A, /■)V= [hayhja, - 1 {LfY{xy) = {haY hj aJi, + l{JK fY {xy) , 

 {h.fYy,= {haYhJhya-\{h, fYy {xy) ; 



{h, fYy = {haYK'a^ay-l {h, f)%xy) = {ha)%jajhy-]- ^ {KfY{xy) , 

 {hJYy. = {haY V < -^{h,f)\{xy)-ì {hJY {^VY 



= {il aY V«x /< y «^ — 3 (^^ fYy{^y)^ 20 ^''' ^)'(^^)' 



(/^ fYy, = (/m)* w; - (^'- fYy^. i^y) - 1 (/^ /r.(>^2/)^ 

 = (A a)* V «r /«/ «y + 5 (^' /')'r (^ yY ; 



(/k Z")^, = {}iaY}i;^a:ra- \ {h, fY{xy)={haYKWhy+ ^ {hJY {xy) , 

 {h,f)%, = {haYhJ a,. <- - 1 (/^ f)\{xy) - |j' {h,fY{xyY 



= {haYhJaJÌY+l{h, fYy{xy)^\{h,fY{xyY = ..- , 

 {h,fYy,= {ha)'hJa;-^-l {h, f)\, {xy) - ^^ {h, f)% {xyf 



-\{h,fY{xyY = -^ 



{K fYy. = {h aY V Ka; - l {li.f)\, (^y) - ^ (A, ff^, {xyf 



_Uh,fYy{xyY^.-.\ 



