#16671: implement harmonic number function H(n,m)
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Reporter: rws | Owner:
Type: defect | Status: needs_review
Priority: major | Milestone: sage-6.3
Component: symbolics | Resolution:
Keywords: special, log | Merged in:
Authors: Ralf Stephan | Reviewers:
Report Upstream: N/A | Work issues:
Branch: | Commit:
u/rws/implement_harmonic_number_function_h_n_m_|
fd0ccd6ea2e7f6a0abf92ee85207c011250b9496
Dependencies: | Stopgaps:
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Comment (by nbruin):
Sorry, this isn't really your fault, but as it turns out the whole
`_maxima_init_evaled_` mechanism gets used in a way that's broken:
parameters do not get processed recursively. See #16732. As an
illustration:
{{{
sage:sage: maxima_calculus(polylog(3,polylog(3,x)))
li[3](polylog(3,x))
}}}
Note that the second argument doesn't get appropriately processed. Your
implementation suffers from the same problem.
Either we change the way that `_maxima_init_evaled_` gets called (i.e., we
pass it arguments that are processed by the maxima translator itself) or
we must change all the `_maxima_init_evaled_` implementations to do that
properly (at least a bunch presently don't). An argument against giving
`_maxima_init_evaled_` preprocessed arguments is that in principle it's
conceivable that a function has an argument that needs special treatment.
So letting `_maxima_init_evaled_` do the recursive argument processing
under its own control is the more flexible (but more onerous) scheme.
--
Ticket URL: <http://trac.sagemath.org/ticket/16671#comment:17>
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