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Subscript Variable

• To: mathgroup at smc.vnet.net
• Subject: [mg20188] Subscript Variable
• From: CORNIL Jack Michel <jmcornil at club-internet.fr>
• Date: Tue, 5 Oct 1999 04:04:19 -0400
• Organization: Lycée Privé Sainte Geneviève VERSAILLES
• Sender: owner-wri-mathgroup at wolfram.com

Hello,

I have a problem about subscript variables.

First Question :

If I use a variable named Subscript[x,1] ,
(typed in with Ctrl _)
 
I can affect a value to this variable, get value of expressions
involving this variable, clear this variable with . but not with Clear[]
!

This variable is not given when I ask Names["x*"] and I cannot get
information on it with ?.


Second Question :

If I use such a variable in order to define a function with
  f1[x_]=x^2+1
I cannot clear the variable with f1=.
(of course, just above f1 means Subscript[f,1])


Thanks a lot for any help


J.Michel CORNIL