PARTICULARLY THOSE OF TWO VARIABLES. 
829 
— c 8 2t^ 8 ’ 0 ’ ■® 8 ' 1 ’ yY~^~ • • • 
+ ( 2?l i ) ! (N 8l0J N 8i1 , N 8i2 , . . . , N 8(W . . . , N 8 i 2 nXp°) y) %lJ r .(159), 
where 
C 8 =A 1 .Ky*A*.(160), 
. <,61) ' 
^9 = C 9 2!(®9,0j B 9i i, B 9j ^x, y) 2 + . . . 
+( 2 n\ ^ ^ 9 , 1 ? -^9,3> ■ • - 5 N 9)W .. ., N 9t ztifcx, y) %lJ r ■ • • • (163), 
where 
c 9 =A 1 .c^KV i A % .(164), 
AT / 7r \/7r\ 25 d n / . 
(x) drf»-'df C * .( 165 )’ 
, T r'KA/7r\2M/7r\2(^h d » +1 , , , , 
N 9> 2j+ i~ 7T 3 (k) (a) ^y»^^+A* c?K, '> / Ai * • • • ( 166 )- 
^10= C 10 aJ + C 102/ — ^j( CJ 10,0 J ^10,l> ^10,3> ^10,sX X > 2/) 3 + • • • 
2% + l!^ 10,0 ’ ^iQ-2’ * * ,f Pio,. • • •> Pio, 2 «+iX^> 2 /) 2w+1 + . . . (167), 
where 
r'KA a , YttXOT . x 
c 10 =^A,.yy*A^ w .(168), 
c 'io=X A i-y i r' i K*A'.(169), 
_ /nr- \2(n—,$)/**■ \2s rfn /. 
10 ’ s ' =KA (k) (a) KA.( 170 )> 
T) l/7r\ 2 ^)/7r\ 3 * d n . , ^ . 
-P 10.3J+1 A\K/ VaJ dp'“-‘dq'* Ac 1 0.( m )* 
