#11356: Companion matrix constructor
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Reporter: rbeezer | Owner: jason, was
Type: enhancement | Status: needs_review
Priority: minor | Milestone: sage-4.7.1
Component: linear algebra | Keywords: beginner
Work_issues: | Upstream: N/A
Reviewer: | Author: Rob Beezer
Merged: | Dependencies:
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Comment(by rbeezer):
Replying to [comment:5 jason]:
> Yes, and my point is that since we follow the magma convention of
putting basis vectors in rows, do we need to be consistent with their
convention of format='bottom'?
> And yes, I've also always seen it with format='right' as well.
And my point is that "follow the convention" is stronger than the reality.
I like to say Sage has a "preference" for rows. The RDF/CDF
decompositions return basis vectors in columns, Jordan form returns basis
vectors in columns and I'm sure I can find more. So, if I can get a basis
to convert to rational canonical form, then "right" will be the correct
choice. I think this is a place where consistency for other
decompositions is to be preferred.
Besides the overwhelming use of "right" in the literature. I would rather
not look oddball to newcomers, just to be consistent with a language with
a miniscule audience.
Rob
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/11356#comment:6>
Sage <http://www.sagemath.org>
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