Groups > comp.soft-sys.math.mathematica > #1501

Re: Integrate gives wrong results for a simple polynomial

From	Scott Hemphill <hemphill@hemphills.net>
Newsgroups	comp.soft-sys.math.mathematica
Subject	Re: Integrate gives wrong results for a simple polynomial
Date	2011-04-06 09:13 +0000
Organization	Steven M. Christensen and Associates, Inc and MathTensor, Inc.
Message-ID	<inhasn$2am$1@smc.vnet.net> (permalink)
References	<inerm4$j58$1@smc.vnet.net>

Show all headers | View raw

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

Back to comp.soft-sys.math.mathematica | Previous | Next — Previous in thread | Find similar | Unroll thread

Thread

Re: Integrate gives wrong results for a simple polynomial Daniel Lichtblau <danl@wolfram.com> - 2011-04-05 10:42 +0000
  Re: Integrate gives wrong results for a simple polynomial Scott Hemphill <hemphill@hemphills.net> - 2011-04-06 09:13 +0000

csiph-web