Is it possible to have a kerning reconfiguration in the preamble to allow a small amount of whitespace for specific letters.
In this example, I would want right space to the right of g
and f
when used as an italic in an equation.
Minimal Example, compiled using xelatex
\documentclass{article}
\usepackage{amsmath}
\usepackage{mathspec}
\setallmainfonts{Adobe Minion Pro}
\usepackage{MnSymbol}
\let\mathdollar\relax
\usepackage{lipsum}
\begin{document}
\lipsum[1]
\begin{equation*}
\begin{aligned}
\delta n_a &= \delta \left( \frac{\epsilon \partial_a f}{ \sqrt{g^{bc} \partial_b f \partial_c f }} \right) \\
&= -\frac{1}{2} n_\mu \delta g^{bc} g_{bc} \\
&= \frac{1}{2} \epsilon n_a n^b n^c \delta g_{ab} \qquad \qquad \epsilon n_a n^c = g^c_a - \gamma^c_a \\
&= \frac{1}{2} n^b \delta g_{ab} + c_b \qquad \qquad c_b = -\frac{1}{2} \gamma^c_a \delta g_{bc} n^b
\end{aligned}
\end{equation*}
\lipsum[1]
\end{document}
Screenshot as an example
Edit
Included regular text around screenshot to show kerning of body text and included code of a minimal example
mathspec
has its own method for specifying a kern in these cases with"