Also, imaginary(gamma(1.+I*5)), say, works fine as long as it's not
inside a numerical integral
Ian
On Apr 17, 2:57 pm, Ian Petrow <ianpet...@gmail.com> wrote:
> Hello Everyone,
>
> I know numerical integration isn't great in SAGE, but I think the
> following isn't too complicated. I try
>
> sage: numerical_integral(imaginary(gamma(1-I*t)),-15,15)
>
> which fails, and give a LONG error message. I won't put the whole
> thing here, but it starts:
>
> ERROR: An unexpected error occurred while tokenizing input
> The following traceback may be corrupted or invalid
> The error message is: ('EOF in multi-line statement', (35, 0))
>
> ---------------------------------------------------------------------------
> TypeError Traceback (most recent call
> last)
>
> /Users/ianpetrow/<ipython console> in <module>()
>
> /Applications/sage/local/lib/python2.6/site-packages/sage/gsl/
> integration.so in sage.gsl.integration.numerical_integral (sage/gsl/
> integration.c:1622)()
>
> /Applications/sage/local/lib/python2.6/site-packages/sage/symbolic/
> expression.so in sage.symbolic.expression.Expression._fast_float_
> (sage/symbolic/expression.cpp:29478)()
>
> /Applications/sage/local/lib/python2.6/site-packages/sage/symbolic/
> expression_conversions.pyc in fast_float(ex, *vars)
> 1212 1.4142135623730951
> 1213 """
> -> 1214 return FastFloatConverter(ex, *vars)()
> 1215
> 1216 #################
>
> etc etc etc, and says at the end
>
> TypeError: cannot convert I to real number
>
> Whereas on the other hand,
>
> numerical_integral(imaginary(1+I*t),-15,15)
> (0.0, 2.4968976137148349e-12)
>
> works just fine. What gives? I'm running version 4.6 in OS X.
>
> Thanks,
>
> Ian
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