#18258: Fix coercion for matrix groups / matrix spaces
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Reporter: vdelecroix | Owner:
Type: enhancement | Status: new
Priority: major | Milestone: sage-6.7
Component: linear algebra | Keywords:
Merged in: | Authors:
Reviewers: | Report Upstream: N/A
Work issues: | Branch:
Commit: | Dependencies: #18231
Stopgaps: |
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Add several fix to matrix groups and matrix spaces:
- matrix space should not override the `__call__` of `Parent`
- matrix groups should by default define a coercion embedding to the
associated matrix space
- use the method `_matrix_` to define a default conversion to matrix
spaces
It would solve the two following issues
{{{
sage: G = SL(3,QQ)
sage: M = MatrixSpace(QQ,3)
sage: G.one() == M.identity_matrix() # pb 1
False
sage: G.one() + M.identity_matrix() # pb 2
... BOOM ...
}}}
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Ticket URL: <http://trac.sagemath.org/ticket/18258>
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