Baffling change to partial derivative in version 5.1
- To: mathgroup at smc.vnet.net
- Subject: [mg61555] Baffling change to partial derivative in version 5.1
- From: Steven HANCOCK <Steven.Hancock at cern.ch>
- Date: Sat, 22 Oct 2005 00:35:59 -0400 (EDT)
- Organization: CERN
- Sender: owner-wri-mathgroup at wolfram.com
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 Merely changing the spelling of the variable from t to time does not return zero in version 4.2. Thanks, Steve.
- Follow-Ups:
- Re: Baffling change to partial derivative in version 5.1
- From: Chris Chiasson <chris.chiasson@gmail.com>
- Re: Baffling change to partial derivative in version 5.1