#17245: Matrix class __init__ for sparse matrices is incorrectly documented
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Reporter: darij | Owner:
Type: defect | Status: needs_review
Priority: minor | Milestone: sage-6.4
Component: linear algebra | Resolution:
Keywords: matrices, | Merged in:
documentation, | Reviewers:
Authors: Darij Grinberg | Work issues:
Report Upstream: N/A | Commit:
Branch: public/matrix | a74bc0cc7b98f429d69c4bdc842bcb3866ff077e
/doc-input-matrix-class | Stopgaps:
Dependencies: |
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Comment (by darij):
Now that I am looking at this again, it worries me that matrix classes for
matrices over QQ, ZZ and Zmod(n) ignore the `coerce` and `copy`
attributes. The idea might be that integers, rationals and ints mod n do
not need to be coerced -- but I don't think this is the case (particularly
ints mod n); and that integers, rationals and ints mod n do not need to be
copied because they are already immutable -- but the `copy` attribute does
not copy the entries, but copies the *list/dict* of entries, and that is
always mutable.
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Ticket URL: <http://trac.sagemath.org/ticket/17245#comment:3>
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