Mike wrote: > > I'd like to be able to do linear programming to arbitrary precision. The > documentation that I've found claims that both the glpk and PPL solvers > should do this, but I haven't been able to get either to work. > > As an example, the following code prints c to high precision, but the > solutions only to 12 digits. Where should I look for guidance? > Note: this seeks to maximize x+y given that 3x<=1 and 3y<=1, so the > solution is (1/3, 1/3) > > Mike M > > R=RealField(100) > c=Matrix(R, 2, 1, [-1, -1]) > G=Matrix(R, 2, 2, [3, 0, 0, 3]) > h=Matrix(R, 2, 1, [1, 1]) > print c # To check the precision being used by "print" > print > > sol=linear_program(c,G,h) > print sol['x'] > sol=linear_program(c,G,h, solver='glpk') > print sol['x'] > sol=linear_program(c,G,h, solver='PPL') > print sol['x'] > > This reminds me of a recent discussion about precision and number of correct digits through a calculation:
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