# [XeTeX] Math accent bug

Joel C. Salomon joelcsalomon at gmail.com
Fri Sep 25 00:01:28 CEST 2009

Big hats, little hats:

% !TEX TS-program = xelatex
% !TEX encoding = UTF-8
\documentclass{minimal}

\usepackage{unicode-math}
\setmathfont{Cambria Math}

\begin{document}\noindent
Differently-sized accents for thin \& wide chars:
$\hat\imath\hat w$,
which is good \\
---but the accent also gets wider to cover subscripts:
$\hat x\hat x_x$,
which is less good.\\
Notice that only the width it altered, not the position;
specifically, these are not the same:
$\hat x^{xxxx}\hat{x^{xxxx}}$.
\end{document}

There was an issue with the \vec & \dot accents where the position of
the accent shifted, making  $\dot x_x$  identical to  $\dot{x_x}$ ; I
was writing  $\dot x{}_x$  for a while.  That part of the problem was
fixed, but it seems some code still wants to glue the subscript to the
base and the \hat accent suffers.

—Joel Salomon