Hello all

I would like to ask you how to focus non linear equations solving in Eigen. I mean:
- Is there somebody working in it now?
- Did you know libraries to do it that could match well with Eigen? (including similar license)

The last solution I have is to port the solver I use that comes in a 90% from Numerical Recipes. But I would prefer to include something with a LGPL like license.

Best regards
Koldo

There is the start of an IterativeSolvers module in the unsupported/Eigen directory. Currently it's very small, people have been talking about adding more stuff though, see e.g. the thread "Levenberg-marquardt and dogleg minimizer" in the mailing list archive. If you want to help here, you're most welcome to, perhaps just send a mail to the mailing list to avoid duplication of effort, but at the moment I'm not sure if anyone is working on this.

What is the current state of Non Linear Solvers in Eigen?

So far we decided to focus on other parts, so there is not much more except a LevenbergMarquardt module that is cleaner than the one in the NonLinearOptimization module and that supports sparse Jacobian.