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Re: Integrate gives wrong results for a simple polynomial

  • To: mathgroup at smc.vnet.net
  • Subject: [mg117969] Re: Integrate gives wrong results for a simple polynomial
  • From: Scott Hemphill <hemphill at hemphills.net>
  • Date: Wed, 6 Apr 2011 05:13:25 -0400 (EDT)
  • References: <inerm4$j58$1@smc.vnet.net>
  • Reply-to: hemphill at alumni.caltech.edu

Daniel Lichtblau <danl at 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 at alumni.caltech.edu
"This isn't flying.  This is falling, with style."  -- Buzz Lightyear


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