Status: New
Owner: ----
Labels: Type-Defect Priority-Medium
New issue 4068 by [email protected]: series(sqrt(sec(x)), x,
x0=pi*3/2, n=4) raises PoleError
http://code.google.com/p/sympy/issues/detail?id=4068
series(sqrt(sec(x)), x, x0=pi*3/2, n=4)
...
/home/pape/sympy/sympy/core/function.pyc in _eval_nseries(self, x, n, logx)
525 subs = e.limit(_x, S.Zero)
526 if subs.is_bounded is False:
--> 527 raise PoleError("Cannot expand %s around
0" % (self))
528 term = subs*(x**i)/fact
529 term = term.expand()
PoleError: Cannot expand sec(_x + 3*pi/2) around 0
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