#5
10-14-2012, 04:36 PM
 rpistu Member Join Date: Oct 2012 Posts: 10

I have almost understund the problem. But still have a question that what the meaning of the resulting of E(u+∆u,v+∆v) in Part (b), (e-i), and (e-ii). Is it a number or a formula?

Also what the difference of the two parts of (e). One is to minimize E2, the other is to minimize E(u+∆u,v+∆v). So, what the difference of those two?

Quote:
 Originally Posted by magdon Yes, in this problem you can use (u,v)=(0,0) from part (a). ||(∆u,∆v)||=0.5 means that the step size . In the chapter we considered two step sizes. First where the step size was fixed at . Second where the step size is proportional to the norm of the gradient. Here, for part (b) the step size is fixed at 0.5.