On Wed, Mar 17, 2010 at 5:21 AM, Pablo Angulo <pablo.ang...@uam.es> wrote:
> Sorry to come back to this (two weeks) old topic, but what do you think
> about raising an exception whenever a symbolic integral (or any symbolic
> computation) fails? Otherwise, is there a simple way to distinguish a
> succesful integration from failed ones that are just indicated (e.g.,
> integrate(e^(x*sin(x)), x))?

You can check whether or not you get an unevaluated integral like this:

sage: f = integrate(x^2, x)
sage: isinstance(f.operator(),
sage.symbolic.integration.integral.IndefiniteIntegral)
False
sage: f
1/3*x^3
sage: f = integrate(e^(x*sin(x)), x)
sage: isinstance(f.operator(),
sage.symbolic.integration.integral.IndefiniteIntegral)
True
sage: f
integrate(e^(x*sin(x)), x)

--Mike

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