#10876: Create elementary matrices
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Reporter: rbeezer | Owner: jason, was
Type: enhancement | Status: needs_work
Priority: minor | Milestone: sage-4.7
Component: linear algebra | Keywords:
Author: Rob Beezer | Upstream: N/A
Reviewer: Karl-Dieter Crisman | Merged:
Work_issues: |
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Comment(by kcrisman):
Replying to [comment:5 rbeezer]:
> KDC,
>
> I'm thinking there is no way to have an optional ring, like so many of
the other constructors, ''and'' consolidate all three matrices into one
function.
Unless you make the arguments mandatory (I guess making them keywords).
Which, for a pedagogical function, is actually not so bad. I think that
would be preferable to having instructors of LA who are not so
knowledgeable about rings, or don't want to bother students with them,
being forced to use the ring.
I usually like flexibility, but keeping these all in one function seems
good, and asking for 'row1' and 'scale' seems very appropriate if you're
learning what the elementary matrices are in the first place. I really
doubt any heavy user is going to be using this function instead of writing
a small script to generate their own (possible sparse) matrices!
Also, if you were to do this, I figure that in the case of scaling a
single row, one could allow the keyword 'row' instead of 'rows'. Any
interest in also providing column elementary matrices? I guess one could
just multiply on the right... ;)
> And which won't allow the same row for the "add a multiple of a row to a
row" version.
Haha, yes!
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/10876#comment:6>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
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