#15482: Say very loud that LP variables are positive by default
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Reporter: | Owner:
ncohen | Status: needs_work
Type: | Milestone: sage-5.13
defect | Resolution:
Priority: major | Merged in:
Component: | Reviewers: Punarbasu Purkayastha
documentation | Work issues:
Keywords: | Commit:
Authors: | b50d7af25a94022efa29eccd3637bcd9396fab16
Nathann Cohen | Stopgaps:
Report Upstream: N/A |
Branch: |
u/ncohen/15482 |
Dependencies: |
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Changes (by kcrisman):
* status: positive_review => needs_work
Comment:
Great and fast work. But... sorry, not loud enough.
If you look at
[http://www.sagemath.org/doc/thematic_tutorials/linear_programming.html
the LP tutorial], there is no indication of this (other than a
parenthetical "for instance when you want some variables to be negative")
- and that is where people will end with current SEO results.
[http://www.sagemath.org/doc/reference/numerical/sage/numerical/mip.html
This doc] does have it in the opening example, but even there it is not as
visible as possible. I think that for positive review here, we really
need to have a `:warning` or something like that in a few places.
Remember, this is for people coming to LP who are not in all likelihood
crazy graaaaaph theorists or in operations research, and who (like me,
though I am not a complete novice to using LPs) will not at all suspect
this problem.
And we all know that students only look for worked examples in order to do
their homework, so why should it be any different with working people in
the mathematical sciences? :-)
--
Ticket URL: <http://trac.sagemath.org/ticket/15482#comment:7>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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