#4513: [with patch, needs review] Action of MatrixGroup on a MPolynomialRing
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Reporter: SimonKing | Owner: SimonKing
Type: enhancement | Status: new
Priority: major | Milestone: sage-3.2.1
Component: commutative algebra | Resolution:
Keywords: matrix group, action, polynomial ring |
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Comment (by SimonKing):
One observation:
Reverse the outer loop
{{{
for i from l>i>=0:
X = tuple(Expo[i])
c = Coef[i]
for k from 0<=k<n:
if X[k]:
c *= Im[k]**X[k]
q += c
}}}
It results in a further improvement of computation time. Is this
coincidence? Or is it since summation of polynomials should better start
with the smallest summands?
Anyway, I didn't change the patch yet.
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/4513#comment:6>
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Sage - Open Source Mathematical Software: Building the Car Instead of
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