#18213: A lot of polytopes constructor are broken
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Reporter: vdelecroix | Owner:
Type: defect | Status: needs_review
Priority: major | Milestone: sage-6.7
Component: geometry | Resolution:
Keywords: | Merged in:
Authors: Vincent Delecroix | Reviewers:
Report Upstream: N/A | Work issues:
Branch: | Commit:
u/vdelecroix/18213 | fac3cffdb326dad1d3c61045d1c33044c99b8b32
Dependencies: #18211 | Stopgaps:
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Comment (by ncohen):
Hello,
> Which one did you expected? I improved the documentation.
Well, I expected an orthogonal projection on this hyperplane. And I
probably expected the base of the hyperplane to be the projection of d-1
vectors of the base from the original space I guess.
> > - At this point I still do not know if it is very wise to use this
definition of
> > the projection, but it would be cool if every function which uses
this
> > projection (like !Simplex) could redirect toward the matrix
function. This way
> > people would have a chance to learn what exactly they get as a
result.
>
> I see. But I am really not confortable in moving this to `matrix.<tab>`
as well. One possibility is to move it back to `polytopes.<tab>`. What do
you think?
All I was suggesting in the message above was to add a link in the doc.
The message you added in `project_points` is perfect
{{{
The projection used is the matrix given by :func:`zero_sum_projection`.
}}}
To me it should appear whenever there is a 'project' argument in the
function.
> Is it not clear enough? The coordinates of the icosahedron need to be
defined in `QQ[sqrt(5)]`, hence the error.
Precisely: Could you add somewhere in the doc that the field must contain
`QQ(sqrt(5))`?
Nathann
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Ticket URL: <http://trac.sagemath.org/ticket/18213#comment:28>
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