如何在数学模式下使用轮廓来表示斜体符号？

Question

我试图在数学模式下使粗体符号更粗（\boldsymbol对我来说不够粗），到目前为止，我发现的最佳解决方案是使用contour。但是，当在数学模式中使用轮廓时，它会使符号失去斜体行为。有没有办法在方程中使用轮廓来产生斜体字符？

\documentclass{article}
\usepackage{amsmath}
\usepackage[outline]{contour}
\newcommand{\A}{\contour{black}{A}}
\begin{document}
\begin{enumerate}
\item Using math mode within contour works:
\contour{black}{$A$} $ = 1$

\item but I want to use contour within math mode:
$\contour{black}{A} = 1$

\item since I'd like to eventually define the variables as bold elsewhere in the document:
$\A = 1$
\end{enumerate}
\end{document}

这就是为什么\bm它对我来说不够粗体的原因：你能轻易分辨出哪些 r 是粗体的吗？

与使用轮廓相比：

Answer 1

您可以使用$\contour{black}{$A$} = 1$，但这会产生相当模糊的粗体，并且在上标中不起作用，而不会进一步增加复杂性\mathchoice。通常最好使用粗体字体。

\documentclass{article}
\usepackage{amsmath}
\usepackage[outline]{contour}
\newcommand{\A}{\contour{black}{$A$}}
\usepackage{bm}
\bmdefine\Abm{A}
\begin{document}
\begin{enumerate}
\item Using math mode within contour works:
\contour{black}{$A$} $ = 1$

\item but I want to use contour within math mode:
$\contour{black}{$A$} = 1$

\item since I'd like to eventually define the variables as bold elsewhere in the document:
$\A = 1$
\end{enumerate}

\begin{enumerate}
\item Using math mode within contour works: $\bm{A} = 1$

\item but I want to use contour within math mode:
$\bm{A} = 1$

\item since I'd like to eventually define the variables as bold elsewhere in the document:
$\Abm = 1$
\end{enumerate}
\end{document}