#16137: lazy_list from various input data
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Reporter: MatthieuDien | Owner:
Type: enhancement | Status: new
Priority: major | Milestone: sage-6.2
Component: misc | Resolution:
Keywords: LazyPowerSeries, lazy_list, | Merged in:
days57 | Reviewers:
Authors: Vincent Delecroix, Matthieu | Work issues:
Dien | Commit:
Report Upstream: N/A | Stopgaps:
Branch: |
Dependencies: |
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Comment (by mantepse):
I don't think it is a good design decision to have `lazy_list` include
functionality that really belong to formal power series or recursive
sequences. I think that this is one of the things Axiom/FriCAS really got
right: there is one class (in Axiom-parlance: `Stream`) which does not
require any functionality from the elements. Formal power series and
sequences then use this class, and allow access to it via a method
`coefficients`.
In any case, there is quite a large interesting hierarchy of formal power
series and sequences, and it is in my opinion a very bad idea to single
out rational or hypergeometric functions.
Note that I am not at all against functionality that allows to define lazy
lists recursively (on the contrary!), just please do not limit it to
sequences built of numbers then.
--
Ticket URL: <http://trac.sagemath.org/ticket/16137#comment:5>
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