在文字模式下也帶有點的數字零

Question

\documentclass[a4paper,11pt]{article}
\usepackage[T1]{fontenc}
\usepackage[utf8]{inputenc}
\usepackage{lmodern}
\usepackage{empheq}

\makeatletter
\newcommand*{\pmzerodot}{%
\nfss@text{%
\sbox0{$\vcenter{}$}% math axis
\sbox2{0}%
\sbox4{0\/}%
\ooalign{%
  0\cr
  \hidewidth
  \kern\dimexpr\wd4-\wd2\relax % compensate for slanted fonts
  \raise\dimexpr(\ht2-\dp2)/2-\ht0\relax\hbox{%
    \if b\expandafter\@car\f@series\@nil\relax
      \mathversion{bold}%
    \fi
    $\cdot\m@th$%
  }%
  \hidewidth
  \cr
  \vphantom{0}% correct depth of final symbol
}%
}%
}
\makeatother

\begin{document}
\begin{empheq}{align}
0 + 1 = 1
\end{empheq}
\end{document}

\pmzerodot方程式編號如何加？

相關：在支援 LaTeX 的非 OpenType 中插入斜線零

Answer 1

下面的範例定義了\dotarabic，它類似於\arabic列印阿拉伯語形式的計數器，其中的零被 交換\pmzerodot。 \theequation被重新定義為使用\dotarabic而不是\arabic （或\arabic可以重新定義，如果帶點的零應該由所有計數器輸出使用）。

此外，由於受到/系統的約束\pmzerodot，因此變得穩健。脆弱命令將在內部定義期間中斷。\the<counter>\label\ref\@currentlabel

完整範例：

\documentclass[a4paper,11pt]{article}
\usepackage[T1]{fontenc}
\usepackage[utf8]{inputenc}
\usepackage{lmodern}
\usepackage{empheq}

\makeatletter
\DeclareRobustCommand*{\pmzerodot}{%
  \nfss@text{%
    \sbox0{$\vcenter{}$}% math axis
    \sbox2{0}%
    \sbox4{0\/}%
    \ooalign{%
      0\cr
      \hidewidth
      \kern\dimexpr\wd4-\wd2\relax % compensate for slanted fonts
      \raise\dimexpr(\ht2-\dp2)/2-\ht0\relax\hbox{%
        \if b\expandafter\@car\f@series\@nil\relax
          \mathversion{bold}%
        \fi
        $\cdot\m@th$%
      }%
      \hidewidth
      \cr
      \vphantom{0}% correct depth of final symbol
    }%
  }%
}

\newcommand*{\dotarabic}[1]{%
  \expandafter\@dotarabic\csname c@#1\endcsname
}
\newcommand*{\@dotarabic}[1]{%
  \expandafter\dotarabic@scan\number #1\relax
}
\newcommand*{\dotarabic@scan}[1]{%
  \ifx\relax#1%
    \expandafter\@gobble
  \else
    \expandafter\@firstofone
  \fi
  {%
    \ifnum#1=0 %
      \ifincsname
        0%
      \else
        \pmzerodot
      \fi
    \else
      #1%
    \fi
    \dotarabic@scan
  }%
}
\makeatother

\renewcommand*{\theequation}{\dotarabic{equation}}

\begin{document}
  \addtocounter{equation}{9}
  \begin{empheq}{align}
    \label{eq:test}
    \pmzerodot + 1 = 1
  \end{empheq}
\end{document}