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