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Re: newbie question about the symbol E

• To: mathgroup at smc.vnet.net
• Subject: [mg28324] Re: newbie question about the symbol E
• From: Jens-Peer Kuska <kuska at informatik.uni-leipzig.de>
• Date: Wed, 11 Apr 2001 02:01:02 -0400 (EDT)
• Organization: Universitaet Leipzig
• References: <9arn5o$qna@smc.vnet.net>
• Sender: owner-wri-mathgroup at wolfram.com

Hi,

it's not possible to use E but you many use \[ScriptCapitalE] instead
that fit to the physical usual notation of the kinetic energy and the
Lagrangian :-)

Regards
  Jens

"Martin P. Pos" wrote:
> 
> I want to declare a function of energy E, say f[E], but mathematica doesn't
> allow me to use E as a symbol, because it is reserved for the exponential
> constant. In the frontend I use <esc>ee<esc> to enter that exponential
> constant, but i want E to be the variable of this function.
> 
> Similar, I can declare a constant, e.g.:
> 
> Subscript[E, F] := 10
> 
> But when I do:
> 
> Clear[Subscript[E, F]]
> 
> mathematica responds:
> 
> "Clear::ssym : eF is not a symbol or string"
> 
> where eF is the exponential constant, subscript F.
> 
> I want to enter the following formula:
> 
> f[x_] := 1/(1 + E^((Subscript[x, F] - x)/(k*T)))
> 
> where E should be the exponential constant and x should be E (capital e)
> 
> Is there a way to do what I want, or is it not possible to use E?
> 
> Regards, Martin P. Pos