sage: m = matrix([[2,-1,-1],[-1,2,-1],[-1,-1,2]])
sage: Q = ZZ^3/m.row_space()
sage: Q.0
(1, 0)
sage: Q.1
(0, 1)
sage: m = matrix([[3,-1,-1,-1],[-1,3,-1,-1],[-1,-1,3,-1],[-1,-1,-1,3]])
sage: Q = ZZ^4/m.row_space()
sage: Q.0
) failed:
AttributeError: 'sage.matrix.matrix_integer_sparse.Matrix_integ
http://www.sagemath.org/packages/standard/ gives a 404 error.
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So the link should be changed on
http://www.sagemath.org/download-packages.html?
On Friday, May 15, 2015 at 2:21:09 PM UTC-7, David Perkinson wrote:
>
> I'm getting a 404 Error: page not found from
> http://www.sagemath.org/packages/optional/.
>
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I'm getting a 404 Error: page not found from
http://www.sagemath.org/packages/optional/.
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Here is a typical error when I try to run a combinatorial function:
sage: combinations([1,2],3)
File "", line 1
[ ]gap>
^
SyntaxError: invalid syntax
Linux Fedora 9, 2.6.27.7-53.fc9.i686 on a Thinkpad
SAGE Version 3.
