Show that in terms of convergence characteristics, the reduced gradient method behaves like the...

Show that in terms of convergence
characteristics, the reduced gradient method behaves like the gradient
projection method applied to a scaled version of the . Let r be the condition
number of LM and s the condition number of CT C. Show that the rate of
convergence of the reduced gradient method is no worse than [(sr − 1)/(sr
+ 1)] 2.