#16676: Cardinality of infinite sets loops forever
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Reporter: defeo | Owner:
Type: defect | Status: new
Priority: major | Milestone: sage-6.3
Component: combinatorics | Resolution:
Keywords: sets infinite_loop | Merged in:
Authors: | Reviewers:
Report Upstream: N/A | Work issues:
Branch: | Commit:
Dependencies: | Stopgaps:
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Comment (by defeo):
Replying to [comment:3 vdelecroix]:
> > This is a different problem and an easy fix, though, as long as we
agree that `False` means "I don't know".
>
> I do not agree.
Me neither. So I guess someone must step up and add three-way logic to the
Set API. A grep for `Unknown` in Sage src shows three-way logic is used
almost nowhere inside Sage, and certainly not in sets.
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Ticket URL: <http://trac.sagemath.org/ticket/16676#comment:4>
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