#16719: not all gap integers get converted
--------------------------+------------------------------------------------
Reporter: rws | Owner:
Type: defect | Status: new
Priority: major | Milestone: sage-6.3
Component: interfaces | Keywords: gap, bignum, expect, pexpect
Merged in: | Authors:
Reviewers: | Report Upstream: N/A
Work issues: | Branch:
Commit: | Dependencies:
Stopgaps: |
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As first reported in #15625 (comment:7) with `lucas_number1`, the same
problem is encountered with gap evaluation of Stirling numbers:
{{{
sage: stirling_number1(1000,2)
---------------------------------------------------------------------------
TypeError Traceback (most recent call
last)
<ipython-input-22-b29f3b3e2003> in <module>()
----> 1 stirling_number1(Integer(1000),Integer(2))
/home/ralf/sage/local/lib/python2.7/site-
packages/sage/combinat/combinat.pyc in stirling_number1(n, k)
650 """
651 return
Integer(gap.eval("Stirling1({0},{1})".format(Integer(n),
--> 652
Integer(k))))
653
654
/home/ralf/sage/local/lib/python2.7/site-packages/sage/rings/integer.so in
sage.rings.integer.Integer.__init__
(build/cythonized/sage/rings/integer.c:7902)()
TypeError: unable to convert x (=<integer 301...000 (2566 digits)>) to an
integer
}}}
Alternatively, this ticket may discuss abandoning the GAP expect interface
for such big number results and use libpari instead.
--
Ticket URL: <http://trac.sagemath.org/ticket/16719>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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