如果使用 unicode-math，则用其变体替换希腊字母

Question

什么时候unicode 数学使用时，例如用其变体替换希腊字符不再像以前那样有效：

\let\phi\varphi

使用unicode-math实现相同功能的方法是什么？

---

最小示例：

\documentclass[a4paper]{article}
\usepackage{fontspec}
\usepackage{unicode-math}

%\setmathfont{MnSymbol}
%\setmathfont[range=\mathit/{num,latin,Latin,greek,Greek}]{MinionPro-It}

\let\phi\varphi
\let\epsilon\varepsilon

\begin{document}

\noindent
varphi: $\varphi$ works!\\
phi: $\phi$ should look the same, but does not!\\
I actually want to fix the missing epsilon in MinionPro:\\
varepsilon: $\varepsilon$ works!\\
epsilon: $\epsilon$ doesn't!\\

\end{document}

Answer 1

正如您在其他帖子的答案中所看到的，您必须在文档开始后定义符号。

% arara: lualatex

\documentclass[a4paper]{article}
\usepackage{unicode-math}
\AtBeginDocument{%
\let\phi\varphi
\let\epsilon\varepsilon
}

\begin{document}    
    \noindent
    varphi: $\varphi$ works!\\
    phi: $\phi$ should look the same, but does not!\\
    I actually want to fix the missing epsilon in MinionPro:\\
    varepsilon: $\varepsilon$ works!\\
    epsilon: $\epsilon$ doesn't!\\  
\end{document}