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Re: Problem with Expand and Modulus in Mathematica 9?

  • To: mathgroup at smc.vnet.net
  • Subject: [mg129288] Re: Problem with Expand and Modulus in Mathematica 9?
  • From: Bill Rowe <readnews at sbcglobal.net>
  • Date: Sat, 29 Dec 2012 15:11:06 -0500 (EST)
  • Delivered-to: l-mathgroup@mail-archive0.wolfram.com
  • Delivered-to: l-mathgroup@wolfram.com
  • Delivered-to: mathgroup-newout@smc.vnet.net
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On 12/28/12 at 5:37 AM, hemmecke at gmail.com (Ralf Hemmecke) wrote:

>Can someone confirm that the following code gives different results
>for r1 for different versions of Mathematica and different operating
>systems. Or is this just an issue of my installation?

>Value of r1 Mathematica 8
>1808010833 + 1914426603*n + 640234431*n^2 + 1087084730*n^3

>Mathematica 9 (64bit Debian 6.0)
>1651432217 + 309632549*n + 188919829*n^2 + 1597920481*n^3

>Mathematica 9 (32bit Debian 6.0, 64bit CPU)
>1823075307 + 33175446*n + 2081129601*n^2 + 580053941*n^3

>The values of r2, s1, s2 agree with that of r1 as computed in
>Mathematica 8.

I get the following results for r1:

In[12]:= $Version

Out[12]= 8.0 for Mac OS X x86 (64-bit) (October 5, 2011)

In[13]:= r1

Out[13]= 1087084730 n^3+640234431 n^2+1914426603 n+1808010833

and

In[12]:= $Version

Out[12]= 9.0 for Mac OS X x86 (64-bit) (November 20, 2012)

In[13]:= r1

Out[13]= 1597920481 n^3+188919829 n^2+309632549 n+1651432217




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