[sage-support] Re: wrong answer from MixedIntegerLinearProgram(solver = "PPL")

2013-02-01 Thread Dima Pasechnik
On 2013-01-31, Daniel Friedan wrote: > --=_Part_880_30796308.1359641848689 > Content-Type: text/plain; charset=ISO-8859-1 > > First, I'll try my MILP problems in double-precision (probably using > CPLEX). I'll re-post my question about arbitrary precision if it turns out > that I need it. I

[sage-support] Re: wrong answer from MixedIntegerLinearProgram(solver = "PPL")

2013-01-31 Thread Daniel Friedan
First, I'll try my MILP problems in double-precision (probably using CPLEX). I'll re-post my question about arbitrary precision if it turns out that I need it. We definitely needed arbitrary precision when we did some related problems using semi-definite programming (over the real numbers -- w

[sage-support] Re: wrong answer from MixedIntegerLinearProgram(solver = "PPL")

2013-01-30 Thread Dima Pasechnik
On 2013-01-29, dfrie...@gmail.com wrote: > Dmitrii, > > Thanks very much. Sorry for the dumb posting. I should have mentioned > in my posting that I'm just getting into MILP in Sage. > > Would it be equally dumb to post a question asking if there is an > arbitrary precision real arithmetic sol

Re: [sage-support] Re: wrong answer from MixedIntegerLinearProgram(solver = "PPL")

2013-01-30 Thread dfriedan
Dmitrii, Thanks very much. Sorry for the dumb posting. I should have mentioned in my posting that I'm just getting into MILP in Sage. Would it be equally dumb to post a question asking if there is an arbitrary precision real arithmetic solver for MILP in Sage? (maybe a version of GLPK?)

[sage-support] Re: wrong answer from MixedIntegerLinearProgram(solver = "PPL")

2013-01-29 Thread Daniel Friedan
Thanks. Sorry for the dumb posting. Daniel On Tuesday, January 29, 2013 3:37:43 PM UTC, Dima Pasechnik wrote: > > On 2013-01-29, Daniel Friedan > wrote: > > --=_Part_964_12292304.1359472365223 > > Content-Type: text/plain; charset=ISO-8859-1 > > > > The following example from Sage Refere

[sage-support] Re: wrong answer from MixedIntegerLinearProgram(solver = "PPL")

2013-01-29 Thread Dima Pasechnik
On 2013-01-29, Daniel Friedan wrote: > --=_Part_964_12292304.1359472365223 > Content-Type: text/plain; charset=ISO-8859-1 > > The following example from Sage Reference v5.6 >> Numerical Optimization >> > Mixed integer linear programming > http://www.sagemath.org/doc/reference/sage/numer