[Tex/LaTex] How to make a superscript on the upper left hand corner of a letter?

math-modesuperscripts

Possible Duplicate:
Left and right subscript

How can I make a superscript on the upper left hand corner of a letter?

Best Answer

You can use the standard ^ operator; if you require better control, the leftidx package can be an option:

\documentclass{article}
\usepackage{amsmath}
\usepackage{leftidx}

\begin{document}

$ ^{i}A \qquad\leftidx{_1^2}{\left(\frac{1}{b}\right)}{_3^4}$

\end{document}

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