#6922: Matrix term ordering
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Reporter: klee | Owner: Somebody
Type: enhancement | Status: new
Priority: minor | Milestone: sage-feature
Component: basic arithmetic | Keywords: term order
Reviewer: | Author:
Merged: |
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Changes (by klee):
* author: Kwankyu Lee =>
Comment:
I agree partially. Should we follow the Singular syntax exactly? For short
syntax, how about just "m(1,3,1,0)"? I personally think the Singular
syntax for term ordering is somewhat cryptic.
I think it is better for Sage to support both the string description and
{{{TermOrder}}} description. Thus for examples,
{{{
order='m(1,3,1,0)'+'deglex(2)'
}}}
{{{
order='m(1,3,1,0),deglex(3)'
}}}
for a square matrix m,
{{{
order=TermOrder(m)+TermOrder('deglex',3)
}}}
are all supported.
Marshall Hampton says:
I agree with John that Simon's example:
{{{
sage: M = Matrix(2,2, [1,3,1,0])
sage: R.<a,b,c,d,e,f> = PolynomialRing(QQ, order=TermOrder(M)
+TermOrder('deglex',3))
}}}
looks good and reasonably intuitive to me.
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/6922#comment:3>
Sage <http://sagemath.org/>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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