Date: May 18, 2012 5:27 AM
Author: André Hautot
Subject: clearing a variable with a dummy subscript


Hi !
Here is something very simple I don't understand :

f[x_] := x; f[2] (*A function*)
2

Clear[f]; f[2] (*The same perfectly cleared as expected*)
f[2]


Subscript[u, k_] := k; Subscript[u, 2] (*u with subscript k_
entered via the palette*)
2

Clear[u]; Subscript[u, 2] (*I found no way to clear u; a
suggestion ?)
2

Thanks in advance,

ahautot