#20447: Wrong result from delsarte_bound_additive_hamming_space with GLPK exact
simplex
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Reporter: mkoeppe | Owner:
Type: defect | Status:
Priority: major | needs_info
Component: coding theory | Milestone: sage-7.2
Keywords: lp | Resolution:
Authors: | Merged in:
Report Upstream: Not yet reported upstream; | Reviewers:
Will do shortly. | Work issues:
Branch: | Commit:
Dependencies: #20406 | Stopgaps:
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Comment (by dimpase):
Replying to [comment:7 mkoeppe]:
> Replying to [comment:6 dimpase]:
> > I don't think there is an API to check whether a solver is exact, and
so I never bothered to check this in the code.
>
> You can query the `base_ring` of the MIP and then ask `is_exact`.
well, `is_exact` is a bit too much to ask, one merely needs extra
precision.
(one can figure out how much, in fact).
So you can use a backend that allows you to set the base ring to e.g.
`RealField(2000)`.
Besides, I don't think there are places in Sage that forbid doing things
cause they are "risky".
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Ticket URL: <http://trac.sagemath.org/ticket/20447#comment:8>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
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