#5033: matrix lift function bad in two ways
----------------------------+-----------------------------------------------
Reporter: was | Owner: was
Type: defect | Status: new
Priority: major | Milestone: sage-3.3
Component: linear algebra | Keywords:
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There are two problem here:
{{{
sage: B = matrix(QQ, 2, [1..4])
sage: B.lift()
...
AttributeError: 'RationalField' object has no attribute 'cover_ring'
sage: B.lift?
EXAMPLES:
...
}}}
1. lift should first check if there is a cover_ring attribute. If not, I
think lift should just return self.
2. The lift function is undocumented. It just has examples but no
description of what it is supposed to do.
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/5033>
Sage <http://sagemath.org/>
Sage - Open Source Mathematical Software: Building the Car Instead of
Reinventing the Wheel
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