Hi all, I'm glad to inform you about new release 0.33 of our completely free (license: BSD) cross-platform software:

OpenOpt:

  • cplex has been connected
  • New global solver interalg with guarantied precision, competitor to LGO, BARON, MATLAB's intsolver and Direct (also can work in inexact mode)
  • New solver amsg2p for unconstrained medium-scaled NLP and NSP

FuncDesigner:

  • Essential speedup for automatic differentiation when vector-variables are involved, for both dense and sparse cases
  • Solving MINLP became available
  • Add uncertainty analysis
  • Add interval analysis
  • Now you can solve systems of equations with automatic determination is the system linear or nonlinear (subjected to given set of free or fixed variables)
  • FD Funcs min and max can work on lists of oofuns
  • Bugfix for sparse SLE (system of linear equations), that slowed down computation time and demanded more memory
  • New oofuns angle, cross
  • Using OpenOpt result(oovars) is available, also, start points with oovars() now can be assigned easier

SpaceFuncs (2D, 3D, N-dimensional geometric package with abilities for parametrized calculations, solving systems of geometric equations and numerical optimization with automatic differentiation):

  • Some bugfixes

DerApproximator:

  • Adjusted with some changes in FuncDesigner

For more details visit our site http://openopt.org.

Regards, Dmitrey.

asked 16 Mar '11, 07:16

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Dmitrey
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closed 15 Sep '12, 07:53

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fbahr ♦
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Hi all, I'm glad to inform you about new quarterly release 0.34 of our free OOSuite package software (OpenOpt, FuncDesigner, SpaceFuncs, DerApproximator) .

Main changes:

Python 3 compatibility

Lots of improvements and speedup for interval calculations

Now interalg can obtain all solutions of nonlinear equation (example) or systems of them (example) in the involved box lb_i <= x_i <= ub_i (bounds can be very large), possibly constrained (e.g. sin(x) + cos(y+x) > 0.5)

Many other improvements and speedup for interalg

See http://forum.openopt.org/viewtopic.php?id=425 for more details.

Regards, D.

(16 Jun '11, 07:39) Dmitrey

Hi all, new release of our free 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 (and thus solver interalg) 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.

(15 Sep '11, 12:28) Dmitrey

Hi all,

I'm glad to inform you about new release 0.37 (2011-Dec-15) of our free software, see http://openopt.org for details.

Regards, D.

(15 Dec '11, 12:23) Dmitrey

Hi all, I'm glad to inform you about new release 0.38 (2012-March-15):

OpenOpt:

[interalg][1] can handle discrete variables 
interalg can handle multiobjective problems ([MOP][2])
interalg can handle problems with parameters fixedVars/freeVars
Many interalg improvements and some bugfixes
Add another EIG solver: numpy.linalg.eig
New LLSP solver pymls with box bounds handling

FuncDesigner:

Some improvements for sum()
Add funcs tanh, arctanh, arcsinh, arccosh
Can solve EIG built from derivatives obtained by FD automatic differentiation

SpaceFuncs:

Add method point.symmetry(Point|Line|Plane)
Add method LineSegment.middle
Add method Point.rotate(Center, angle)

DerApproximator:

Minor changes

See more info at http://openopt.org

Regards, D.

(15 Mar '12, 06:31) Dmitrey

Hi all, I'm glad to inform you about new OpenOpt release 0.39 (quarterly since 2007).

OpenOpt is free, even for commercial purposes, cross-platform software for mahematical modeling and (mainstream) optimization. Our website have reached 259 visitors daily, that is same to tomopt.com and ~ 1/3 of gams.com ( details ).

In the new release:

  • interalg (medium-scaled solver with specifiable accuracy abs(f-f*) <= fTol): add categorical variables and general logical constraints, many other improvements
  • Some improvements for automatic differentiation
  • DerApproximator and some OpenOpt/FuncDesigner functionality now works with PyPy (Python with dinamic compilation, some problems are solved several times faster now)
  • New solver lsmr for dense/sparse LLSP (linear least squares)
  • Some bugfixes and some other changes

In our website (openopt.org) you could vote for most required OpenOpt Suite development direction(s).

Regards, D.

(15 Jun '12, 06:19) Dmitrey

The question has been closed for the following reason "Other" by fbahr 15 Sep '12, 07:53

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