Date: May 18, 2012 5:27 AM Author: AndrĂ© 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