In:= Subscript[a, 0] = 1 Out= 1 In:= Clear[Subscript[a, 0]] During evaluation of In:= Clear::ssym: Subscript[a, 0] is not a symbol or a string. >> In:= Clear[a] In:= Subscript[a, 0] Out= 1
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Yes you can, with limitations.
You have at least three different ways to make an assignment to a subscripted symbol a0 :
In each case below, when I write e.g.
When you write:
You make an assignment to
You make a rule for
If you use the Notation palette you mess with underlying Box forms behind the scenes, allowing for assignment to
Each of these can be cleared with either