#20102: test fixed series expansion of powers of functions at poles
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Reporter: behackl | Owner:
Type: defect | Status: new
Priority: major | Milestone: sage-7.1
Component: symbolics | Keywords: pynac
Merged in: | Authors:
Reviewers: | Report Upstream: N/A
Work issues: | Branch:
Commit: | Dependencies: pynac-0.6.3
Stopgaps: |
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Currently we have the following behavior:
{{{
sage: (gamma(x)^2).series(x==0, 2)
Traceback (most recent call last):
...
ValueError: psi_eval(): simple pole
sage: (zeta(x)^2).series(x==1, 2)
(Infinity) + (Infinity)*(x - 1) + Order((x - 1)^2)
sage: (tan(x)^2).series(x==pi/2, 2)
(Infinity) + (Infinity)*(-1/2*pi + x) + Order(1/4*(pi - 2*x)^2)
}}}
This is fixed in the current development version of pynac. This ticket
shall add corresponding doctests.
--
Ticket URL: <http://trac.sagemath.org/ticket/20102>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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