Aditya Mahajan wrote:
> Actually, I only want a pre superscipt, so the following works for me
> 
> \def\presuper#1#2%
>    {\mathop{}% To prevent preceeding mathord atoms to approach
>     \mathopen{\vphantom{#2}}^{#1}% To prevent space between prescript 
> %                                 and next atom.
>     \kern-\scriptspace% remove the space introduced by superscript
>     #2}
> 
> 
> This is not perfect, especially with characters with large left 
> "slope" like A. Any suggestions for improving the macro?

There is no way to fix that automatically, because TeX does not
have 'italic correction' information for the left-side of a glyph.

Best, Taco
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