#10116: norm method does not work for sparse matrices
------------------------------+---------------------------------------------
Reporter: victor | Owner: jason, was
Type: defect | Status: new
Priority: major | Milestone: sage-4.6.1
Component: linear algebra | Keywords: matrices
Author: Victor Miller | Upstream: Reported upstream. Little or no
feedback.
Reviewer: | Merged:
Work_issues: |
------------------------------+---------------------------------------------
Description changed by victor:
Old description:
> sage: M = matrix(ZZ,4,4,sparse=True)
> sage: M.norm()
> Traceback (click to the left of this block for traceback)
> ...
> AttributeError:
> 'sage.matrix.matrix_generic_sparse.Matrix_generic_sparse' object has
> no
> attribute 'SVD'
> sage: M.norm(1)
> Traceback (click to the left of this block for traceback)
> ...
> TypeError: base_ring (=Category of objects) must be a ring
> and similarly for any other argument to norm.
> When I do
> sage: M.base_ring()
> Integer Ring
> But if I do
> sage: M = matrix(ZZ,4,4) # without sparse=True
> everything works ok
New description:
{{{
sage: M = matrix(ZZ,4,4,sparse=True)
sage: M.norm()
Traceback (click to the left of this block for traceback)
...
AttributeError:
'sage.matrix.matrix_generic_sparse.Matrix_generic_sparse' object has
no
attribute 'SVD'
sage: M.norm(1)
Traceback (click to the left of this block for traceback)
...
TypeError: base_ring (=Category of objects) must be a ring
and similarly for any other argument to norm.
When I do
sage: M.base_ring()
Integer Ring
But if I do
sage: M = matrix(ZZ,4,4) # without sparse=True
everything works ok
}}}
--
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/10116#comment:1>
Sage <http://www.sagemath.org>
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