> Thanks a lot for the quick reply. If my plot is incorrect then maybe it would > explain my doubts. However, I cannot see why it is incorrect. In your naming > of variables and constraints the xx axis would represent x1 and yy axis x2. > The blue line is c1, the red c2, and the yellow c3. The interior of the > triangle thus marks the feasible region.
On your plot I didn't find the point that corresponds to the basic solution found by the solver. Just check it, may be I'm wrong. > > If this is correct (please apologise if I'm making some basic mistake here), > then I don't understand how the current basis remain optimal for any positive > objective coefficient after x1>=3.28571, as you said, since for approximately > x>6.5 there is no feasible region. > If the obj coefficient at x1 is increasing, the current basis is *not* changed remaining optimal for *any* positive obj. coefficient, i.e. x1 keeps its current value 3.28571. Please read the reference manual more carefully. _______________________________________________ Help-glpk mailing list [email protected] https://lists.gnu.org/mailman/listinfo/help-glpk
