#20433: InteractiveLPBackend: Implement set_verbosity
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Reporter: mkoeppe | Owner:
Type: enhancement | Status: new
Priority: major | Milestone: sage-7.2
Component: numerical | Resolution:
Keywords: lp | Merged in:
Authors: | Reviewers:
Report Upstream: N/A | Work issues:
Branch: | Commit:
Dependencies: | Stopgaps:
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Comment (by novoselt):
It uses Bland's rule, so no cycles should happen.
I don't see a point in warnings (and especially errors) for inexact field,
otherwise we should start with warnings about stuff like
{{{
sage: one_third = RR(1/3)
sage: one_third
0.333333333333333
sage: 1 - one_third - one_third - one_third
1.11022302462516e-16
KeyboardInterrupt
sage: - one_third - one_third + 1 - one_third
5.55111512312578e-17
sage: - one_third - one_third - one_third + 1
0.000000000000000
}}}
In teaching I found it quite natural to use my module with `RealField(20)`
to get usually sensible results in sensible representations for word
problems. When bad things do happen, it is a great point to illustrate
that blindly trusting computers is not a good idea and using simplex
method in practice is a bit more complicated than it sounds ;-)
--
Ticket URL: <http://trac.sagemath.org/ticket/20433#comment:7>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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