#11476: PartitionTuples.cardinality has problems
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Reporter: pdehaye | Owner: sage-combinat
Type: defect | Status: new
Priority: major | Milestone: sage-5.4
Component: combinatorics | Resolution:
Keywords: | Work issues:
Report Upstream: N/A | Reviewers:
Authors: | Merged in:
Dependencies: | Stopgaps:
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Comment (by andrew.mathas):
I had a reply from Karim Belabas (UMR 5251) on pari-dev and it is just a
matter of increasing the precision:
{{{
(08:12) gp > 1/eta(x)^2
%1 = 1 + 2*x + 5*x^2 + 10*x^3 + 20*x^4 + 36*x^5 + 65*x^6 + 110*x^7 +
185*x^8 + 300*x^9 + 481*x^10 + 752*x^11 + 1165*x^12 + 1770*x^13 +
2665*x^14 + 3956*x^15 + 5822*x^16 + O(x^17)
The series precision is too low, so the 17-th coefficient is unknown. Use
1/eta(x + O(x^101))
if you want to access its 100-th coefficient (for instance).
Cheers,
K.B.
}}}
I'll upload a patch shortly.
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/11476#comment:2>
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