#12103: Use MeatAxe as an optional back end for dense matrices over `GF(p^n)`, p
odd, n>1, `p^n<255`
-------------------------------------+-------------------------------------
Reporter: SimonKing | Owner: jason, was
Type: defect | Status: needs_work
Priority: major | Milestone: sage-6.4
Component: packages: | Resolution:
experimental | Merged in:
Keywords: linear algebra, | Reviewers:
MeatAxe | Work issues:
Authors: Simon King | Commit:
Report Upstream: None of the above | 6c324700abeb37c3e32ebf36c7cf9027c8e70588
- read trac for reasoning. | Stopgaps:
Branch: |
u/SimonKing/meataxe |
Dependencies: #9562 #4260 |
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Comment (by SimonKing):
Recent changes:
- Since we want to wrap the code, it is needed to make the meataxe header
available.
- I found that packages are supposed to give a file called "type". I
declare there that the package is supposed to be optional.
- Since we move libmtx.a from a temporary location to somewhere in
SAGE_LOCAL, it is needed to use "-fPIC".
- The multiplication tables shouldn't pollute the user's current
directory. I propose to store them in SAGE_SHARE/meataxe/.
- !MeatAxe has IO-functions that accept an argument saying that the file
is a library file---but in the IO-functions, it is always first looked
into the current directory, and the library location is only considered if
the current directory didn't work.
- In at least one function, the IO-argument for "library files" is used
wrongly. So, after fixing the IO-function, the wrong argument needed to be
fixed, too.
In meataxe/patches is a patch that fixes these two upstream bugs.
Current status:
- The package builds fine.
- When running the testsuite, I sometimes see a wrong checksum, but when I
repeat the testsuite, everything is fine. I guess upstream's checksum
function is fragile. Not sure if I'm going to fix that.
- With the Cython wrapper on my laptop, I can create !MeatAxe matrices in
a Sage session, and the current directory is not polluted by
multiplication tables.
TODO:
- Finish the Cython wrapper.
--
Ticket URL: <http://trac.sagemath.org/ticket/12103#comment:40>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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