#15705: function PowerSeries.ogf() named wrong
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Reporter: rws | Owner: rws
Type: defect | Status: new
Priority: major | Milestone: sage-6.1
Component: combinatorics | Keywords: series ogf
Merged in: | Authors: rws
Reviewers: | Report Upstream: N/A
Work issues: | Branch:
Commit: | Dependencies:
Stopgaps: |
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The documentation states: ''Returns the ordinary generating function
associated to self.'' But the function is a wrapper for the Pari function
`serlaplace()` which converts to ordinary g.f. in the case of an
exponential g.f.
Example: `1+x+x^2+x^3+x^4+O(x^5)` is generated both by `1/(1-x)+O(x^5)` or
itself, but:
{{{
sage: R.<x> = PowerSeriesRing(ZZ)
sage: (1+x+x^2+x^3+x^4+O(x^5)).ogf()
1 + x + 2*x^2 + 6*x^3 + 24*x^4}}}
}}}
which is clearly wrong given name and definition.
So, I hope you agree it's necessary if I rename `ogf()` to `egf_to_ogf()`
(or a better name), and adapt the docs.
--
Ticket URL: <http://trac.sagemath.org/ticket/15705>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
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