Hi all, I'm glad to inform you about release of OpenOpt 0.27 (numerical optimization framework), FuncDesigner 0.17 (CAS with automatic differentiation, convenient modelling of linear/nonlinear functions, can use convenient modelling for some OpenOpt optimization problems and systems of linear/nonlinear equations, possibly sparse or overdetermined), DerApproximator 0.17 (finite-differences derivatives approximation, get or check user-supplied). These packages are written in Python language + NumPy; license BSD allows to use it in both free and closed-code soft See changelog for details: http://openopt.org/Changelog Regards, D.