#19808: Return cached value for cached function
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Reporter: jdemeyer | Owner:
Type: enhancement | Status: positive_review
Priority: major | Milestone: sage-7.0
Component: misc | Resolution:
Keywords: | Merged in:
Authors: Jeroen Demeyer | Reviewers: Frédéric Chapoton
Report Upstream: N/A | Work issues:
Branch: | Commit:
u/jdemeyer/ticket/19808 | 9768d010e9982db952620c3cc9f2f2848afafe5b
Dependencies: #19810 | Stopgaps:
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Comment (by jdemeyer):
Replying to [comment:4 chapoton]:
> I hope you have a real use case.
I have many!
A typical situation is where you need to compute some invariant X, which
can either be computed directly or which can be immediately derived from
some more complication invariant Y. If you already computed Y, you use it
to get X. If you didn't compute Y already, you compute X directly.
For example, Y could be a group and X its cardinality.
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Ticket URL: <http://trac.sagemath.org/ticket/19808#comment:5>
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