#14247: bell numbers in mpmath is incorrect
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Reporter: tscrim | Owner: sage-combinat
Type: defect | Status: new
Priority: major | Milestone: sage-5.9
Component: combinatorics | Resolution:
Keywords: | Work issues:
Report Upstream: N/A | Reviewers:
Authors: | Merged in:
Dependencies: #10170 | Stopgaps:
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Comment (by fredrik.johansson):
It's not enough to call mpmath.bell(n) and convert to an integer since it
gives a floating-point approximation; you need to set the precision to
slightly more than log_2(B_n) bits.
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/14247#comment:2>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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