Issue 1187: error in (exp(10**(-10)) - 1).evalf(50)
http://code.google.com/p/sympy/issues/detail?id=1187
New issue report by [EMAIL PROTECTED]:
The following result is wrong:
Python 2.4.4 console for SymPy 0.6.2
These commands were executed:
>>> from __future__ import division
>>> from sympy import *
>>> x, y, z = symbols('xyz')
>>> k, m, n = symbols('kmn', integer=True)
>>> f, g, h = map(Function, 'fgh')
Documentation can be found at http://sympy.org/
In [1]: (exp(10**(-10))-1).evalf(50)
Out[1]: 0.00000000010000000000500000364338639858076696442308164431317
The correct result would be
0.00000000010000000000500000000016666666667083333333341666667
as is easily verified from the series expansion
\sum_{k=1}^\infty 10^{-10 k}/k!
Issue attributes:
Status: New
Owner: ----
Labels: Type-Defect Priority-Medium
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