Hi all, new release of our free scientific soft (OpenOpt, FuncDesigner, DerApproximator, SpaceFuncs) v. 0.36 is out: OpenOpt: Now solver interalg can handle all types of constraints and integration problems Some minor improvements and code cleanup FuncDesigner: Interval analysis now can involve min, max and 1-d monotone splines R -> R of 1st and 3rd order Some bugfixes and improvements SpaceFuncs: Some minor changes DerApproximator: Some improvements for obtaining derivatives in points from R^n where left or right derivative for a variable is absent, especially for stencil > 1 See http://openopt.org for more details. Regards, D.