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Re: derivatives and subscripts

  • To: mathgroup at smc.vnet.net
  • Subject: [mg108747] Re: derivatives and subscripts
  • From: Thomas Melehan <tpmelehan at me.com>
  • Date: Tue, 30 Mar 2010 05:00:38 -0500 (EST)

Subscripted variables don't behave well.  

Use Symbolize[subscripted variable]  

Needs[Notation] 


On Mar 29, 2010, at 6:20 AM, fizzy wrote:

> I try to use subscripts as much as possible even for defining functions 
> of say x,y,z....Note that I use the palette to do this which I can't 
> reproduce here....example.....defining the 'x' component of the Electric 
> Field which is a function of Cartesian coordinate 'x'......
> 
> E subscript Script x [x]
> 
> 
> where the E subscript comes from the Basic Math palette....and the 
> Script x comes from the Special Characters palette.....E is taken from 
> the Greek letters....
> 
> there is no problem with this until I take the derivative....I get the 
> following output...
> 
> 
> (E subscript Script x) ' [x]......
> 
> Prior to version 6 I got what i wanted, namely....
> 
> E subscript Script x ' [x] ......
> 
> 
> .....I tried a rule to get rid of the extra parentheses as well as a 
> Format statement....but neither fixed it....I also tried the Notations 
> package to Symbolize subscripts  but still get the same output.....here 
> is how I tried to use a rule....
> 
> rule={(E subscript Script x) ' [x] -> E subscript Script x ' 
> [x]//HoldForm......}
> 
> any ideas?
> 
> thanks...jerry blimbaum



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