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Re: NMinimize Bug in Mathematica 7.0?

• To: mathgroup at smc.vnet.net
• Subject: [mg96235] Re: [mg96197] NMinimize Bug in Mathematica 7.0?
• From: Brett Champion <brettc at wolfram.com>
• Date: Tue, 10 Feb 2009 05:48:31 -0500 (EST)
• References: <200902091033.FAA12301@smc.vnet.net>

On Feb 9, 2009, at 4:33 AM, appris at att.net wrote:

> Here is an example from Mathematica's user's guide:
>
> In[8]:= NMinimize[x^4 - 3 x^2 + x, x]
>
> Out[8]=  {-3.513905039, {x -> -1.300839566}}
>
> however, trying to replicate it, I get the following:
>
> In[2]:= NMinimize[x^4 - 3 x^2 + x, x]
>
> Out[2]= {-1.070230182, {x -> 1.130901122}}
>
> One way to find the global min, I had to use a constraint such as x<0.
>
> Has anyone come across such a problem?
>
> In[3]:= $Version
>
> Out[3]= "7.0 for Microsoft Windows (32-bit) (November 10, 2008)"

This is fixed in 7.0.1.

Brett Champion
Wolfram Research

• References:
  • NMinimize Bug in Mathematica 7.0?
    • From: appris@att.net