#19635: Enumeration functionality for products of projective spaces over fields
and
finite fields
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Reporter: gjorgenson | Owner:
Type: enhancement | Status: needs_work
Priority: minor | Milestone: sage-7.1
Component: algebraic | Resolution:
geometry | Merged in:
Keywords: | Reviewers: Ben Hutz
Authors: Grayson Jorgenson | Work issues:
Report Upstream: N/A | Commit:
Branch: | 449d0738bfd0d9e85deea38f5ff94cdf1356e745
u/gjorgenson/ticket/19635 | Stopgaps:
Dependencies: |
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Comment (by bhutz):
The need to use copy() in the iterator was bothering me and this seems to
be a more endemic problem. If you initialize a point with a list of points
and change an element of that list, it changes the point. This does not
seem like desired behavior as it does not behave like that for regular
projective points.
{{{
P=ProjectiveSpace(1,QQ,'x')
P2=ProjectiveSpace(1,QQ,'y')
PP=P2.cartesian_product(P)
Q=P(1,1)
Q2=P2(0,1)
M=[Q2,Q]
QQ=PP(M);print QQ
M[0]=P2([1,1]);print QQ
}}}
Consequently, I think the copy needs to be somewhere in _init_
--
Ticket URL: <http://trac.sagemath.org/ticket/19635#comment:6>
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