Hi Volker and lists,
I compiled Sage from v4.6's tar ball, and I had no trouble with this issue.
So the problem seems, as you said, a mismatch of the environment on
which Sage-binary
is built and is ran. Thank you for your advice.
BTW, in this brand new binary, I had
{{{
sage:
Note that your command is equivalent to
timeit('identity_matrix(1009).det()')
Things could of course always be faster; Though the different algorithms for
determinants of integral matrices seems to be similarly fast. The only thing
thats really a lot faster is computing with floating point
On Tue, 28 Dec 2010 at 03:41PM +0900, Iwao Kimura wrote:
On Save v4.6, (Ubuntu 10.04, 64bit), I found that
{{{
p = 103; identity_matrix(p).det()
Traceback (most recent call last):
Hrm, that works fine for me -- using Ubuntu 10.10, 64bit, and on Ubuntu
10.04, 32 bit. I increased p up to about
Hi Dan,
Thank you for your interest. My Ubuntu box has 3GB memory.
I tried several times (via Web interface, via terminal, exit Sage and
invoke new Sage session...), and I always can reproduce same run-time error.
I can install more 3GB memory after holiday and I'll try again.
Best regards.
On
You are not running out of memory in that computation if you have 3GB of
ram. It seems like something in linbox (which is used for matrices of that
size) dies during the computation. I also recently ran into some issues with
linbox and blas, and was wondering if they are related. Can you run
Hi Volker,
Thank you for your message. I followed your suggestion and run Sage with
gdb. I agree with you that linbox and blas (ATLAS) are suspected.
Best regards
--
| Sage Version 4.6, Release Date: 2010-10-30
The fact that this dies somewhere deep in the atlas internals probably means
that your CPU doesn't support one of the SSE instructions that atlas was
compiled with. I'd bet that if you compile Sage from sources on your machine
then it'll work.
--
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Hi all,
On Save v4.6, (Ubuntu 10.04, 64bit), I found that
{{{
p = 103; identity_matrix(p).det()
Traceback (most recent call last):
File stdin, line 1, in module
File _sage_input_132.py, line 10, in module
exec compile(u'open(___code___.py,w).write(# -*- coding:
utf-8 -*-\\n +
