XeTeX obviously makes somehow an effort to set the italic correction
for open type fonts. But it seems to fail in math. Can something be
done about it?
\documentclass[12pt]{article}
\usepackage{fontspec}
\setmainfont{Times New Roman}
\makeatletter
\DeclareSymbolFont{letters}{\zf@enc}\rmdefault\mddefault\itdefault
%\DeclareSymbolFont{letters}{T1}{ptm}\mddefault\itdefault %works
\begin{document}
{\itshape f}( {\itshape f\/}( \emph{f}( \textit{f}( \textit{f\/}(
$f(a)$
\end{document}
--
Ulrike Fischer
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