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Topic: Integrate gives wrong results for a simple polynomial
Replies: 4   Last Post: Apr 6, 2011 4:31 AM

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Scott Hemphill

Posts: 190
Registered: 12/13/04
Re: Integrate gives wrong results for a simple polynomial
Posted: Apr 6, 2011 4:31 AM
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Daniel Lichtblau <danl@wolfram.com> writes:

> $Assumptions = p > 0; Integrate[Subscript[x, 1]*(1 + y)^2, {y, -1, 1}]

I can confirm that it fails for 7.0.1 under Linux:

In[1]:= $Version

Out[1]= 7.0 for Linux x86 (64-bit) (February 18, 2009)

In[2]:= $Assumptions = p > 0; Integrate[Subscript[x, 1]*(1 + y)^2, {y, -1, 1}]

x
1
Out[2]= --
3

The correct answer should be eight times this value.

Scott
--
Scott Hemphill hemphill@alumni.caltech.edu
"This isn't flying. This is falling, with style." -- Buzz Lightyear




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