x y

f(igi2) i j2 j4 ij

g(il'i2 )Jl J3 J, J3


i i I
x

%x x x





 j2
X X
2 r x x


 j4
 Tx x xB
IXXX
%x X x~




 13
 x x
 2x xX


 FIGURE 3-8
A DECOMPOSED PROBLEM