#18290: cardinality and is_finite methods for CartesianProduct
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Reporter: vdelecroix | Owner:
Type: enhancement | Status: needs_review
Priority: major | Milestone: sage-6.7
Component: categories | Resolution:
Keywords: cartesian_product | Merged in:
Authors: Vincent Delecroix | Reviewers:
Report Upstream: N/A | Work issues:
Branch: | Commit:
u/vdelecroix/18290 | 7311911a110c5c3f0c30ab049dbaf66df7e080c7
Dependencies: | Stopgaps:
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Comment (by ncohen):
> I would love to have an `is_empty`... What do you think to add it in the
sets category (and set the default implementation to be `return not
self.cardinality()`?). The code in this branch would be much cleaner with
that.
I'd say that it would be good, but I do not think that I should be
patching category codes given my next-to-zero understanding of how it
works.
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Ticket URL: <http://trac.sagemath.org/ticket/18290#comment:7>
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