Integrate gives wrong results for a simple polynomial
- To: mathgroup at smc.vnet.net
- Subject: [mg117912] Integrate gives wrong results for a simple polynomial
- From: Micket <micketeer at gmail.com>
- Date: Mon, 4 Apr 2011 06:29:48 -0400 (EDT)
I have had the bad luck to discover a strange bug (?) when computing
some integrals with mathematica.
I simplified it as far as i could;
$Assumptions = p > 0; Integrate[Subscript[x, 1]*(1 + y)^2, {y, -1, 1}]
If i change anything else, be it the assumption (yes, it is a
completely unrelated variable), the subscript, the integration limits,
the exponent, the addition, it works out the correct answer.
It also takes a significant time (a few seconds) to compute this
integral.
Does anyone have an explanation for this behavior?