Updates:
Labels: WrongResult
Comment #5 on issue 2073 by [email protected]: limit() throws TypeError:
an integer is required
http://code.google.com/p/sympy/issues/detail?id=2073
Now limit is working, but gruntz fails:
In [9]: n = Symbol('n')
In [10]: r = Symbol('r', positive=True)
In [11]: c = Symbol('c')
In [12]: p = Symbol('p', positive=True)
In [13]: m = Symbol('m', negative=True)
In [14]: expr = ((2*n*(n - r + 1)/(n + r*(n - r + 1)))**c + \
....: (r - 1)*(n*(n - r + 2)/(n + r*(n - r + 1)))**c - n)/(n**c
- n)
In [15]: expr = expr.subs(c, c + 1)
In [16]: gruntz(expr, n, oo)
Out[16]: 1
In [17]: gruntz(expr.subs(c, p), n, oo)
Out[17]: 1
Tests:
https://github.com/sympy/sympy/pull/2326
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