#10752: Matrix pivots are cached, should be immutable
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Reporter: rbeezer | Owner: jason, was
Type: defect | Status: needs_review
Priority: minor | Milestone: sage-4.7
Component: linear algebra | Keywords: matrix pivots
Author: John Palmieri | Upstream: N/A
Reviewer: | Merged:
Work_issues: |
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Changes (by jhpalmieri):
* status: needs_work => needs_review
Comment:
Okay, here's a new patch. This should return tuples for pivots. Also,
everywhere pivots get cached, tuples should be cached, not lists. (This
way, when the cached value is retrieved, converting it to a tuple, just to
be on the safe side, is really fast: try doing {{{a = tuple(range(1000));
timeit('tuple(a)')}}}.)
All doctests pass on sage.math.
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/10752#comment:8>
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