2011/11/9 Ondřej Čertík <[email protected]> > On Wed, Nov 9, 2011 at 7:46 AM, [email protected] > <[email protected]> wrote: > > In [21]: s = summation(k**(-2.1), (k, 1, oo)) > > In [23]: %timeit s.evalf() > > 1 loops, best of 3: 196 ms per loop > > > > In [24]: s = summation(k**(-x), (k, 1, oo)) > > In [26]: %timeit s.evalf(subs={x : 2.1}) > > still calculating > > > > This seems like a bug? > > What happens if you do: > > s.subs({x: 2.1}).evalf() > > ? > > it works In [3]: %timeit s.subs({x : 2.1}).evalf() 1 loops, best of 3: 195 ms per loop
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