Hi all, I'm currently working at a physics research group and I need to find a way to solve an optimization problem with multiple non linear equations. I don't have any significant background, but I've looked in a few books we have around the office and didn't find much - I'm hoping you all can help me out. Barring anything else, suggestions on good books are much appreciated as well. I've got equations of the form and I'm trying to find the values of and that minimize the total error . Can anyone point me in the right direction?