Hello, We like to announce a new release of the high-level Levenberg-Marquardt library levmar: http://hackage.haskell.org/package/levmar-0.2 Changes: * There's one new major feature: automatic calculation of the Jacobian using automatic differentiation with Conal Elliott's vector-space library. (Conal: would you like to take a quick look at the implementation and see if I'm using vector-space the way it supposed to be used, thanks) * Furthermore we made the type Model from LevMar more type-safe by replacing: type Model m r = NFunction m r [r] with: type Model m n r = NFunction m r (SizedList n r) * Finally we did lot's of internal refactorings and updated the documentation. regards, Bas and Roel van Dijk