#19473: FiniteDimensionalAlgebra.is_unitary is not sufficient
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Reporter: darij | Owner:
Type: defect | Status: needs_review
Priority: major | Milestone: sage-6.10
Component: algebra | Resolution:
Keywords: finite- | Merged in:
dimensional algebra, linear | Reviewers: Travis Scrimshaw
algebra | Work issues: clear up
Authors: Darij Grinberg, | associativity requirement; if
Travis Scrimshaw | necessary, change superclass and
Report Upstream: N/A | is_unitary method
Branch: | Commit:
public/algebra/finite_dim_algebra_fixes-19473|
0cfe0366fc527d2f692c835be3d40f60aa61c471
Dependencies: | Stopgaps:
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Comment (by tscrim):
Replying to [comment:16 pbruin]:
> It seems to me that there are four mostly independent issues:
> 1. the wrong `is_unitary()` method;
> 2. the fact that the multiplication table is mutable;
> 3. determining the correct category;
> 4. implementing unique representation.
> We could possibly fix issue 2 on this ticket (assuming it just takes a
few lines), but also doing 3 and 4 on this ticket would be way too much in
my opinion. I would prefer just solving issue 1 on this ticket and
opening separate tickets (possibly with dependencies) for issues 2, 3 and
4.
Then let us just fix 1 here and use the changes on the current branch as a
followup ticket.
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Ticket URL: <http://trac.sagemath.org/ticket/19473#comment:17>
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