[sage-devel] Re: Linear Programming and MIP... Let's start something huge !

2009-08-26 Thread dmitrey
Maybe I misunderstood your question about indexed variables, you do can create and use arrays of oovars and oofuns, eg from FuncDesigner import * N = 100 a = oovars(N) # create array of N oovars b = oovars(N) # another array of N oovars some_lin_funcs = [i*a[i]+4*i + 5*b[i] for i in xrange(N)] f =

[sage-devel] Re: Linear Programming and MIP... Let's start something huge !

2009-08-26 Thread dmitrey
On Aug 26, 7:47 pm, Nathann Cohen wrote: > Hello ! > > > You could be interested in the approach implemented in FuncDesigner LP > > model:http://openopt.org/NumericalOptimizationForFuncDesignerModels#LP_example > > Maybe in future I'll add FuncDesigner examples for MILP and some more > > classes.

[sage-devel] Re: Linear Programming and MIP... Let's start something huge !

2009-08-26 Thread dmitrey
Hi all, I have been pointed to the discussion some time ago. You could be interested in the approach implemented in FuncDesigner LP model: http://openopt.org/NumericalOptimizationForFuncDesignerModels#LP_example Maybe in future I'll add FuncDesigner examples for MILP and some more classes. Let m

[sage-devel] Re: COIN-OR libraries in SAGE ?

2009-03-30 Thread dmitrey
On Mar 30, 6:46 pm, William Stein wrote: > On Mon, Mar 30, 2009 at 8:43 AM, dmitrey wrote: > > > Hi there, > > I've been informed of the discussion, > > so my 2 cents: > > OpenOpt can work without CVXOPT installed (you can easily ensure it > > via r

[sage-devel] Re: COIN-OR libraries in SAGE ?

2009-03-30 Thread dmitrey
Hi there, I've been informed of the discussion, so my 2 cents: OpenOpt can work without CVXOPT installed (you can easily ensure it via running /examples/nlp_1.py, that uses ralg). The mentioned files (http://trac.openopt.org/openopt/browser/OOPy/openopt/solvers/CVXOPT/ *.py) are imported IF and ON

[sage-devel] Re: openopt spkg for Sage

2009-01-30 Thread dmitrey
list write rights but I don't set "obtain messages from the lists" in my settings, because I already have an awful lots of other subscriptions), so if someone want to ask something about OpenOpt it's better to do via http://forum.openop

[sage-devel] Re: numerical optimization in sage

2007-09-20 Thread dmitrey
if I understand correctly, eclipse has its own language, like AMPL or GAMS, while OpenOpt uses Python (+NumPy), like TOMLAB is based on MATLAB. Best regards, Dmitrey http://openopt.blogspot.com/ P.S. I had some troubles with sending the message, sorry if you got it for twice. On Sep 20, 12:03

[sage-devel] Re: numerical optimization in sage

2007-09-19 Thread dmitrey
On Sep 20, 12:03 am, "David Joyner" <[EMAIL PROTECTED]> wrote: > I have no ideas, but would like to mention the OS > constraint solver eclipsehttp://eclipse.crosscoreop.com/ > probably belongs to the same family of programs. > This was mentioned at the GAP conference but I've forgotten > why now.