Asbjørn Nilsen Riseth

Hi @longemen3000, thank you for the interest in helping out :) NB: I have little knowledge of the current needs of the JuliaNLSolvers group, @pkofod can probably direct you more...

Hi @baggepinnen, is this to use with Optim or with a different package? The `BackTracking` line search will only decrease the step size from the initial guess you pass it....

An exact linesearches is a great idea:) Why are you searching on [0,2alpha]? Sounds somewhat arbitrary, when alpha is a parameter. On Tue, 23 May 2017, 12:38 Antoine Levitt, wrote:...

> It is at the very least great for illustrational purposes. Hehe, yeah that's what I meant. It would be a bit extreme for normal usage (although a recursive call...

I think we have two different understandings of the values phi_0 and dphi_0. dphi_0 is the value of ```jl vecdot(g(x), s) ``` where `g(x)` is the gradient at the previous...

Oh, I may have misunderstood you. When you say "basically a local minimum", do you mean of phi or of the objective f?

We should probably investigate whether the new step decreases `f(x)` as well. If not we must decrease the search interval.

If your underlying solver that minimises the weighted sum only finds local solutions then you may end up in such situations. It could also be an issue related to how...

How are you extracting the objective values from your first post?

Phi is a matrix of size #objectives times #objectives. Column i represents the values of all the objectives at the minimizer of objective i. So the values of the third...