Dt@x@1

*To*: mathgroup at smc.vnet.net*Subject*: [mg119378] Dt@x@1*From*: Chris Chiasson <chris.chiasson at gmail.com>*Date*: Wed, 1 Jun 2011 04:33:26 -0400 (EDT)

Why does Dt@x@1 return zero? I would expect it to return unevaluated. I noticed this when trying to use expressions similar to D[x@1,y] and kept receiving zero as the answer. The same "problem" occurs with multidimensional input. What should I be doing if I want to generate and symbolically work with the Jacobian of a multidimensional coordinate transformation? Do I have to generate unique symbols for every dimension? I noticed that in the Jacobian article on Mathworld, the notebook uses Subscript in the symbolic expressions (eww). In[41]:= $Version Out[41]= "8.0 for Microsoft Windows (32-bit) (November 7, 2010)" Thanks, -- http://chris.chiasson.name