Re: Fwd: Re: Infinite cycles

> the interesting thing about Matheu's example is that the infeasability
> is constantly increasing over multiple orders of magnitude.

I'm unable to reproduce the effect. Glpsol with default options has no
problem on solving Mathieu's example. If --norelax option is specified,
the primal simplex falls into infinite loop, but this might be expected,
because Harris' ratio test (that is, --relax option used by default)
decreases the number of degenerate steps and thus prevents cycling in
many cases. If the primal simplex fails, I'd recommend using --dual and
--flip options.


Andrew Makhorin