# Using the actual subscript as a variable within thecontext of definitions using the Notation package and Symbolize

I've gotten into the habit of using subscripted variables, invoking the Notation package and Symbolize. Now, I'd like to be able to write something like

In[1]:= Sum[a<sub>i<sub> ,{i,1,2}]
Out[1]:= a<sub>1<sub> + a<sub>2<sub>


but get

Out[1]:= 2 a<sub>i<sub>


I've tried RemoveSymbolize[myBoxes] to get rid of definitions, but it has no effect. I know that

In[2]:= Sum[Subscript[a,i],{i,1,2}]


works as I'd like and may have to do, but I'm curious if the subscripted variables entered using Ctrl+_ can be made to work.

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When you use Symbolize the the complete variable plus subscript is treated as a single symbol -- which is the purpose of the function. To see this wrap Head around your symbolized variable and then try AtomQ. Then try that again with a "normal" subscripted variable. So the "i" that is subscripted is not available for iterations when you use Symbolize ...by design. To remove symbols evaluate ClearNotations. –  Mike Honeychurch Dec 10 '13 at 20:52