[Tex/LaTex] small integral delimiter

delimiterssymbols

while reading a book on maths lately, I have seen a small integral delimiter such that, in what follows:

\begin{equation}
\sum_i^j A_{ij}\int\limits_{-\infty}^{+\infty} \cos x dx 
\end{equation}

the sum and integral would be of the same height. Are you aware of something like that?
Thank you

Best Answer

With an up-to-date texlive-2010, if you use Asana Math font with unicode-math package (requires XeTeX or LuaTeX), you will get an integral that as high as the summation symbol:

\documentclass{article}
\usepackage{unicode-math}
\setmathfont{Asana-Math.otf}

\begin{document}

\begin{equation}
\sum_i^j A_{ij}\int\limits_{-\infty}^{+\infty} \cos x dx 
\end{equation}

\end{document}
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