Re: Baffling change to partial derivative in version 5.1
- To: mathgroup at smc.vnet.net
- Subject: [mg61599] Re: Baffling change to partial derivative in version 5.1
- From: Bill Rowe <readnewsciv at earthlink.net>
- Date: Sun, 23 Oct 2005 05:46:06 -0400 (EDT)
- Sender: owner-wri-mathgroup at wolfram.com
On 10/22/05 at 12:35 AM, Steven.Hancock at cern.ch (Steven HANCOCK)
wrote:
>Please, can anyone explain (or even just reproduce) the following
>behaviour?
>In[1]:= $Version
>Out[1]= 5.1 for Microsoft Windows (October 25, 2004)
>In[2]:= $ReleaseNumber
>Out[2]= 0
>In[3]:= D[x y, t, NonConstants->{x}]
>Out[3]= y D[x, t, NonConstants -> {x}]
>In[4]:= D[x y, time, NonConstants->{x}]
>Out[4]= 0
I get exactly the same behavior with
In[3]:= $Version
Out[3]= "5.2 for Mac OS X (June 20, 2005)"
In[4]:= $ReleaseNumber
Out[4]= 0
Clearly this is a bug since the result should be independent of the variable names
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