the
That's kind of trivial, isn't it? Since y= H(x), Q(x)= x+ H(x)- y= x+ y- y= x.
In general, $\displaystyle X_{n+1}= F(X_n)$ will converge as long as |F'|< 1.2) What is the necessary condition for the iterative series
Xn+1=Q(Xn) to converge to x.
Thank you very much in advance!