50 SULLO SVILUPPO DELLA FUNZIONE PERTURBATRICE 



i i (4/5"-9p'+4) (8p'-Up'-{-5p-ì ) D (0,0) 



--^{'ip"-Qp'+^){^P'-^P-\-'i)Dilfi)-^{2p-l)i4p•'-^p'-^-4)Di2,0) 



+4-(/^'-l)(4/>-3/3+l)Al.l)+^(8/i'-lJi^''+5/5-l)£'(0,2) 



+ (2p-l) (p'-l)i) (2,l)+|(4/)'=-9/)'+4)Z)(3,0)- ^ {4p'-3p-\-l)D{l ,2) 



- 3(/>'-l)D (3,1) -1(2/) -l)£l(2,2) +|z)(3,2) 



i (2/)— 1) (Sp'*— 38/y^+56/)'=— 31/)'+8)£)(0,0) 

 — 1(8/)'*— 38p"+56p"— 3]/)'+8)Z)(l,0) 



- ~(2/)-l) (4/)'=-12/y^+10/)'-4)Z)(0,l) ' '^^" 



l + |(4/)''-12p'=+10/y-4)Z)(l,l) + lp'(2/)-l)Z)(0,2)-l/)'i)(l,2) 



-2(2/)-l)(/J-l)Z)(0,3)-2(2/)-l)i3(0,4)-2(/)'-l)Z)(l,3;+2Z3(l,4)' 



( (2/)'+l)(4p^+9p+4)Z)(0,0)+4(2p'+l)(p+l)Z)(l,0) ) 



F{p'+lj)+2)=] [e'e' 



\ + (4//+9/.+4) /)(0,l)+2(2/)'+l) /)(2,0)+4(/)+l)£)(l ,\)+2D (2,1) ) 



/ - \ (4/5'^+9/3+4) (8/)'^+14/y^+5/V+l)/3(0,0) 

 -^ (/5+1) (8/5'=+14/)''4-5//+l)-D(l,0) 



- \ (4/)^+9/)+4) (4/y^+3/)'+l)/)(0,l)+ i (2/)'+l)(4//+9/)+4)Z)(0,2) 

 \-\ (/>+l)(4p''+3/)'+l)Z)(l,l)- Ì(8p'»+14/)'^+5p'+l)Z)(2,0) 



+(2/>'+l)(/>+l)I>(l,2) + 1 (4/)'+9p+4)/)(0,3)- l(4/)'»+3/)'+l)£)(2,l) 

 \ +3(/)+l)Z)(l ,3) + 1 (2/)'+l)£»(2,2)+|£» (2,3) 



