#8481: lift doesn't work for vector space homomorphisms
------------------------------+---------------------------------------------
Reporter: jhpalmieri | Owner: was
Type: defect | Status: needs_work
Priority: minor | Milestone: sage-4.4
Component: linear algebra | Keywords:
Author: John Palmieri | Upstream: N/A
Reviewer: | Merged:
Work_issues: |
------------------------------+---------------------------------------------
Changes (by was):
* status: needs_review => needs_work
Comment:
1. Can you change this to only do check=True when the base ring is *not* a
field:
{{{
5408 check=False, copy=False,
coerce=False)
5408 check=True, copy=False, coerce=False)
}}}
Or, better yet, always do check=False unless the components of v are not
all in the base ring. The problem is that check=True could be
*massively* expensive -- you could add hours to the runtimes of real-world
computations with this one little change.
2. I'm happy with all the other code.
I'm running tests and will report in a moment.
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/8481#comment:2>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
--
You received this message because you are subscribed to the Google Groups
"sage-trac" group.
To post to this group, send email to [email protected].
To unsubscribe from this group, send email to
[email protected].
For more options, visit this group at
http://groups.google.com/group/sage-trac?hl=en.
