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MathGroup Archive 1996

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Indexed object as a variable

  • To: mathgroup at smc.vnet.net
  • Subject: [mg5287] Indexed object as a variable
  • From: helgebe at ifi.uio.no (Helge Berglann)
  • Date: Sat, 23 Nov 1996 01:44:32 -0500
  • Organization: SUM/Bio
  • Sender: owner-wri-mathgroup at wolfram.com

Is it possible to declare an indexed object in such a way that it behaves
like a variable and not a constant?. That is in the following example to
give the answer Dt[a1] Dt[x[1]] + Dt[a2] Dt[x[2]]

Mathematica 2.2 for DEC RISC
Copyright 1988-93 Wolfram Research, Inc.
 -- Motif graphics initialized -- 

In[1]:= eq = a1 x[1] + a2 x[2] 

Out[1]= a1 x[1] + a2 x[2]

In[2]:= Dt[eq]

Out[2]= Dt[a1] x[1] + Dt[a2] x[2]


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