提供输入
%%% No PDF compression so that you can read PDF as plaintext as possible:
\edef\pdfcompresslevel{\pdfvariable compresslevel}
\edef\pdfobjcompresslevel{\pdfvariable objcompresslevel}
\pdfcompresslevel=0
\pdfobjcompresslevel=0
\documentclass{article}
\pagestyle{empty}
\usepackage{unicode-math}
\begin{document}
\(\vec{C}\)
\end{document}
到lualatex
(或xelatex
没有 pdf 压缩内容的到)在数学斜体大写上产生一个箭头