#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 | Keywords: sets infinite_loop
Merged in: | Authors:
Reviewers: | Report Upstream: N/A
Work issues: | Branch:
Commit: | Dependencies:
Stopgaps: |
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This was reported in Ask question http://ask.sagemath.org/question/23467.
Most operations on Sets have their `cardinality()` method defined by
{{{
return len(list(self))
}}}
This obviously fails on infinite sets which Sage does not know of:
{{{
sage: Set(ZZ).difference(Set()).cardinality()
}}}
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Ticket URL: <http://trac.sagemath.org/ticket/16676>
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