Hi,
I didn't see this problem exactly when I searched through the Issues,
but I wanted to check that it was not a known problem first.
Thanks,
Ben
In [32]: c,n,r = symbols('cnr')
In [33]: limit( (( 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), n, oo )
---------------------------------------------------------------------------
TypeError Traceback (most recent call
last)
/tmp/<ipython console> in <module>()
/usr/lib/pymodules/python2.6/sympy/series/limits.pyc in limit(e, z,
z0, dir)
89
90 try:
---> 91 r = gruntz(e, z, z0, dir)
92 except PoleError:
93 r = heuristics(e, z, z0, dir)
/usr/lib/pymodules/python2.6/sympy/series/gruntz.pyc in gruntz(e, z,
z0, dir)
496 #convert all limits to the limit z->oo
497 elif z0 == oo:
--> 498 return limitinf(e, z)
499 elif z0 == -oo:
500 return limitinf(e.subs(z,-z), z)
/usr/lib/pymodules/python2.6/sympy/series/gruntz.pyc in limitinf(e, x)
337 if e.has(log):
338 e = e.normal()
--> 339 c0, e0 = mrv_leadterm(e,x)
340 sig=sign(e0,x)
341 if sig==1: return S.Zero # e0>0: lim f = 0
/usr/lib/pymodules/python2.6/sympy/series/gruntz.pyc in
mrv_leadterm(e, x, Omega)
395 e_up = moveup([e],x)[0]
396 #calculate the lead term
--> 397 mrv_leadterm_up = mrv_leadterm(e_up, x, Omega_up)
398 #move the result (c0, e0) down
399 return tuple(movedown(mrv_leadterm_up, x))
/usr/lib/pymodules/python2.6/sympy/series/gruntz.pyc in
mrv_leadterm(e, x, Omega)
404 wsym = Symbol("w", real=True, positive=True, dummy=True)
405 f, logw=rewrite(e, set(Omega), x, wsym)
--> 406 series = calculate_series(f, wsym)
407 series=series.subs(log(wsym), logw)
408 return series.leadterm(wsym)
/usr/lib/pymodules/python2.6/sympy/series/gruntz.pyc in
calculate_series(e, x)
370
371 f = e
--> 372 series=f.nseries(x, 0, 2).removeO()
373 if series == 0:
374 #we need to calculate more terms, let's try 4:
/usr/lib/pymodules/python2.6/sympy/core/basic.pyc in nseries(self, x,
x0, n)
2253 See also lseries().
2254 """
-> 2255 return self._eval_nseries(x, x0, n)
2256
2257 def _eval_nseries(self, x, x0, n):
/usr/lib/pymodules/python2.6/sympy/core/mul.pyc in _eval_nseries(self,
x, x0, n)
934 def _eval_nseries(self, x, x0, n):
935 from sympy import powsimp
--> 936 terms = [t.nseries(x, x0, n) for t in self.args]
937 return powsimp(Mul(*terms).expand(), combine='exp',
deep=True)
938
/usr/lib/pymodules/python2.6/sympy/core/basic.pyc in nseries(self, x,
x0, n)
2253 See also lseries().
2254 """
-> 2255 return self._eval_nseries(x, x0, n)
2256
2257 def _eval_nseries(self, x, x0, n):
/usr/lib/pymodules/python2.6/sympy/core/add.pyc in _eval_nseries(self,
x, x0, n)
178
179 def _eval_nseries(self, x, x0, n):
--> 180 terms = [t.nseries(x, x0, n) for t in self.args]
181 return Add(*terms)
182
/usr/lib/pymodules/python2.6/sympy/core/basic.pyc in nseries(self, x,
x0, n)
2253 See also lseries().
2254 """
-> 2255 return self._eval_nseries(x, x0, n)
2256
2257 def _eval_nseries(self, x, x0, n):
/usr/lib/pymodules/python2.6/sympy/core/mul.pyc in _eval_nseries(self,
x, x0, n)
934 def _eval_nseries(self, x, x0, n):
935 from sympy import powsimp
--> 936 terms = [t.nseries(x, x0, n) for t in self.args]
937 return powsimp(Mul(*terms).expand(), combine='exp',
deep=True)
938
/usr/lib/pymodules/python2.6/sympy/core/basic.pyc in nseries(self, x,
x0, n)
2253 See also lseries().
2254 """
-> 2255 return self._eval_nseries(x, x0, n)
2256
2257 def _eval_nseries(self, x, x0, n):
/usr/lib/pymodules/python2.6/sympy/core/power.pyc in
_eval_nseries(self, x, x0, n)
700 lt = b.as_leading_term(x)
701 o = order * lt**(1-e)
--> 702 bs = b.nseries(x, x0, n-e)
703 if bs.is_Add:
704 bs = bs.removeO()
/usr/lib/pymodules/python2.6/sympy/core/basic.pyc in nseries(self, x,
x0, n)
2253 See also lseries().
2254 """
-> 2255 return self._eval_nseries(x, x0, n)
2256
2257 def _eval_nseries(self, x, x0, n):
/usr/lib/pymodules/python2.6/sympy/core/mul.pyc in _eval_nseries(self,
x, x0, n)
934 def _eval_nseries(self, x, x0, n):
935 from sympy import powsimp
--> 936 terms = [t.nseries(x, x0, n) for t in self.args]
937 return powsimp(Mul(*terms).expand(), combine='exp',
deep=True)
938
/usr/lib/pymodules/python2.6/sympy/core/basic.pyc in nseries(self, x,
x0, n)
2253 See also lseries().
2254 """
-> 2255 return self._eval_nseries(x, x0, n)
2256
2257 def _eval_nseries(self, x, x0, n):
/usr/lib/pymodules/python2.6/sympy/core/power.pyc in
_eval_nseries(self, x, x0, n)
656 from sympy.functions import ceiling
657 terms = [1/prefactor]
--> 658 for m in xrange(1,ceiling(n/l)):
659 new_term = terms[-1]*(-rest)
660 if new_term.is_Pow:
TypeError: an integer is required
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