Question

Suppose I define the following (bad) pattern

Subscript[\[Beta], i_][x_] := Subscript[\[Beta], i][x[[i]]];

1. Is it possible to clear this pattern without clearing definitions for all the other subscripted variables? My first thought would be to modify Subscript’s DownValues, but it seems to be empty

2. Is it possible/practical to have functions with subscripted arguments? IE, something along the lines of f[x_1,x_2,x_3]:=Total[x_#&/@Range[3]]. I’ve heard people use Symbolize to help with subscripts, would it work here?

Answer 1

It is in SubValues (see Information["*Values"]).

In[25]:= Subscript[\[Beta],i_][x_]:=Subscript[\[Beta],i][x[[i]]];
SubValues[Subscript]
Out[26]= {HoldPattern[Subscript[\[Beta], i_][x_]]:>Subscript[\[Beta], i][x[[i]]]}

Just use =. to clear:

In[27]:= Subscript[\[Beta],i_][x_]=.
SubValues[Subscript]
Out[28]= {}

HTH