#7797: basic interface to letterplace from singular
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Reporter: burcin | Owner: burcin
Type: enhancement | Status: needs_review
Priority: major | Milestone: sage-4.5
Component: algebra | Keywords: singular
Author: Michael Brickenstein, Burcin Erocal | Upstream: N/A
Reviewer: | Merged:
Work_issues: |
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Comment(by malb):
Replying to [comment:11 PolyBoRi]:
> the result seem to differ just in order. What Ideal class is used for
free algebras?
Apparently, we don't have one which works yet
{{{
sage: P.<a,b,c> = FreeAlgebra(QQ,3)
sage: P
Free Algebra on 3 generators (a, b, c) over Rational Field
sage: P.ideal([a*b+c,a+1])
---------------------------------------------------------------------------
TypeError Traceback (most recent call
last)
/home/malb/<ipython console> in <module>()
/usr/local/sage-4.3/local/lib/python2.6/site-packages/sage/rings/ring.so
in sage.rings.ring.Ring.ideal (sage/rings/ring.c:3426)()
/usr/local/sage-4.3/local/lib/python2.6/site-packages/sage/rings/ideal.pyc
in Ideal(*args, **kwds)
187
188 if not commutative_ring.is_CommutativeRing(R):
--> 189 raise TypeError, "R must be a commutative ring"
190
191 if len(gens) == 0:
TypeError: R must be a commutative ring
}}}
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/7797#comment:12>
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