48 SULLO SVILUPPO DELLA FUNZIONE PERTURBATRICE 



-i- (yj'+l) {8p'+lijr+óp+l)lJ(0,l) 



|— ^(■l/'"+9/^'-Hi) (4/>^+3/)+l)/Xl ,0) + -^- (■2/)+l)f4/y^+9//+4)Z)(;:,0)| 

 |__J_(^y+lj^4/7^+3p+l)Al,l)-^(8//+14//+rv;+l,)Z)(0,3) l 



' + (o^j+l)^^,q_l)/)(2,l)+-^-(4/^'^+07;'+4)/X3,0)-|-(4/-.^+3/>+l)/;(l,2)' 



+ 3(/y+l)Z)(3,l)+-^-(2/J+l)ZJ(~',2)+ -|i3(3,2) 



—^ (2/5+1) C8;)"+3S/)"+56/>'^+31//+8)Z)(0,0) 

 i _ ^ (8/y*+38/)"+5R/y^+31/)'+8)Z)(l,0) 



e-'e" 



ee" 



■^1- i- (2/5+1) (4/)'^+i2/)'-^+i(:»/y+4)Z»(0,i) 



_ 1 (47,'^+127y^+10/)'+4)£»(l,l)+4-/5'(2/5+l)Z)(0,2)+|-i)'i)(l,2) 

 + 2(27J+1) (/>'+l)Z)(0,3)+2(2/J+l)i3(0,4)+2(/y+l)Z;(l,3)+2Z»(l,4) ' 



' _ (o^j_i) (4p'^+97)'+4)Z)(0,0)-4(27)-l) ( p'-hl)D{0,l) j 



F(7/+2,//-l)= .'-'^''■' 



(+(4y/^+9//+4)Z)(l,0)-2(27)-l)i3(0,2)+4(/>'+ljZ)(l,l)+2Z>(l,2)^ 



-^ (4p'=+973'+4) (8/)'-14p^+5/)-l)i)(0,0) 



■4-(P'+l)(8/'-l-l/^'+57i-l)i)(0,l) 



J_(47y^'+9/y+4)(4/J=-3/)+l)ZJ(l,0)-^(2/)-l)(4/y^+9/y+4jA2,0)[ 

 -4- (i5'+l) (4/j'-373+l)/)(l ,1 )+i- (8/)^-14i)^+57)-l)Z)(0,2) 

 -(2p-l)(p'+l)/3(2,l)+-|(4p"+9/)'+4)Z)(3,0)— J-(47/'-3/J+l)Z3(l,2)l 

 -3(/5'+l)i3(3,l)-|-(2i3-l)Z)(2,2) + -|z)(3,2) 



