![如何修改\relbar?](https://linux22.com/image/355748/%E5%A6%82%E4%BD%95%E4%BF%AE%E6%94%B9%5Crelbar%EF%BC%9F.png)
我想排版\rightharpoonup
带头的矢量。我发现最理想的解决方案是这个答案-
,当正文较长时,作者使用它来填充上划线。
-
但是,我现在使用的是 math time professional 2,由于它的加号/减号看起来更大,我借用了重新定义了减号txfonts
。代码如下:
\DeclareSymbolFont{vvsymbols}{OMS}{txsy}{m}{n}
\SetSymbolFont{vvsymbols}{bold}{OMS}{txsy}{bb}{n}
\DeclareMathSymbol{-}{\mathbin}{vvsymbols}{0}
我该如何解决这个问题?我应该重新定义命令吗\relbar
?或者我应该暂时将命令指定-
为该矢量命令中的原始命令?怎么做?
代码
\documentclass[12pt,a4paper,openany,fleqn]{book}
\usepackage[margin=2cm, top=2cm]{geometry}
\usepackage{amsmath}
\usepackage[subscriptcorrection,nofontinfo,zswash,mtphrb]{mtpro2} %this could be commented
\parindent=0pt
\makeatletter
\newcommand*\MY@leftharpoonupfill@{%
\arrowfill@\leftharpoonup\relbar\relbar
}
\newcommand*\MY@rightharpoonupfill@{%
\arrowfill@\relbar\relbar\rightharpoonup
}
% These are not needed, for now:
% \newcommand*\MY@leftharpoondownfill@{%
% \arrowfill@\lefttharpoondown\relbar\relbar
% }
% \newcommand*\MY@rightharpoondownfill@{%
% \arrowfill@\relbar\relbar\rightharpoondown
% }
\newcommand*\overleftharpoon{%
\mathpalette{\overarrow@\MY@leftharpoonupfill@}%
}
\newcommand*\overrightharpoon{%
\mathpalette{\overarrow@\MY@rightharpoonupfill@}%
}
% Support for smaller size arrows:
\newcommand*\@dblsty@mathpalette[2]{%
% Works like "\mathpalette", but macro passed in #1 must take
% (at least) three arguments, of which the first _two_ are
% style selections.
\mathchoice
{#1\displaystyle \scriptstyle {#2}}%
{#1\textstyle \scriptstyle {#2}}%
{#1\scriptstyle \scriptscriptstyle {#2}}%
{#1\scriptscriptstyle \scriptscriptstyle {#2}}%
}
\newcommand*\@dblsty@overarrow@[4]{%
% #1 := stretchable covering arrow
% #2 := base style
% #3 := style for covering arrow
% #4 := base symbol
\vbox{\ialign{##\crcr
#1#3\crcr
\noalign{\nointerlineskip}%
$\m@th\hfil #2#4\hfil$\crcr
}}%
}
\newcommand*\smalloverleftharpoon{%
\@dblsty@mathpalette{\@dblsty@overarrow@\MY@leftharpoonupfill@}%
}
\newcommand*\smalloverrightharpoon{%
\@dblsty@mathpalette{\@dblsty@overarrow@\MY@rightharpoonupfill@}%
}
\newcommand*\myvec{%
\@dblsty@mathpalette{\@dblsty@overarrow@\MY@leftharpoonupfill@}%
}
\makeatother
\DeclareSymbolFont{vvsymbols}{OMS}{txsy}{m}{n}
\SetSymbolFont{vvsymbols}{bold}{OMS}{txsy}{bb}{n}
\DeclareMathSymbol{-}{\mathbin}{vvsymbols}{0}
\begin{document}
$1+1=2=3-1$ (You can see the minus sign became smaller.)\\
$\overrightharpoon{AB}:=\overrightharpoon{\textit{counter}}$
\end{document}
答案1
这是因为amsmath
包装上写着
\AtBeginDocument{%
\mathchardef\std@minus\mathcode`\-\relax
\mathchardef\std@equal\mathcode`\=\relax
}
这会导致\std@minus
重置为新值 ( \mathchar "2400"
),该值指向文档开头的新字体中的减号。只需取消此设置即可\mathchar "2200
恢复原始值。这可以按如下方式完成:
\@ifdefinable\ORG@std@minus{\let\ORG@std@minus\std@minus}
\DeclareSymbolFont{vvsymbols}{OMS}{txsy}{m}{n}
\SetSymbolFont{vvsymbols}{bold}{OMS}{txsy}{bb}{n}
\DeclareMathSymbol{-}{\mathbin}{vvsymbols}{0}
\AtBeginDocument{\let\std@minus\ORG@std@minus}
这是一个完整的、可编译的示例:
\documentclass[12pt,a4paper,openany,fleqn]{book}
\usepackage[T1]{fontenc}
\usepackage[margin=2cm, top=2cm]{geometry}
\usepackage{amsmath}
\parindent=0pt
\makeatletter
\newcommand*\MY@leftharpoonupfill@{%
\arrowfill@\leftharpoonup\relbar\relbar
}
\newcommand*\MY@rightharpoonupfill@{%
\arrowfill@\relbar\relbar\rightharpoonup
}
% These are not needed, for now:
% \newcommand*\MY@leftharpoondownfill@{%
% \arrowfill@\lefttharpoondown\relbar\relbar
% }
% \newcommand*\MY@rightharpoondownfill@{%
% \arrowfill@\relbar\relbar\rightharpoondown
% }
\newcommand*\overleftharpoon{%
\mathpalette{\overarrow@\MY@leftharpoonupfill@}%
}
\newcommand*\overrightharpoon{%
\mathpalette{\overarrow@\MY@rightharpoonupfill@}%
}
% Support for smaller size arrows:
\newcommand*\@dblsty@mathpalette[2]{%
% Works like "\mathpalette", but macro passed in #1 must take
% (at least) three arguments, of which the first _two_ are
% style selections.
\mathchoice
{#1\displaystyle \scriptstyle {#2}}%
{#1\textstyle \scriptstyle {#2}}%
{#1\scriptstyle \scriptscriptstyle {#2}}%
{#1\scriptscriptstyle \scriptscriptstyle {#2}}%
}
\newcommand*\@dblsty@overarrow@[4]{%
% #1 := stretchable covering arrow
% #2 := base style
% #3 := style for covering arrow
% #4 := base symbol
\vbox{\ialign{##\crcr
#1#3\crcr
\noalign{\nointerlineskip}%
$\m@th\hfil #2#4\hfil$\crcr
}}%
}
\newcommand*\smalloverleftharpoon{%
\@dblsty@mathpalette{\@dblsty@overarrow@\MY@leftharpoonupfill@}%
}
\newcommand*\smalloverrightharpoon{%
\@dblsty@mathpalette{\@dblsty@overarrow@\MY@rightharpoonupfill@}%
}
\newcommand*\myvec{%
\@dblsty@mathpalette{\@dblsty@overarrow@\MY@leftharpoonupfill@}%
}
\@ifdefinable\ORG@std@minus{\let\ORG@std@minus\std@minus}
\DeclareSymbolFont{vvsymbols}{OMS}{txsy}{m}{n}
\SetSymbolFont{vvsymbols}{bold}{OMS}{txsy}{bb}{n}
\DeclareMathSymbol{-}{\mathbin}{vvsymbols}{0}
\AtBeginDocument{\let\std@minus\ORG@std@minus}
\makeatother
\begin{document}
$1+1=2=3-1$ (You can see the minus sign became smaller.)\\
Yet the harpoons come out right:
$\overrightharpoon{AB}:=\overrightharpoon{\textit{counter}}$
\end{document}
你可以自己检查输出是否是你要求的:
请注意这个答案假设,由于某些我无法理解的原因,您只想替换减号,但不想切换到一组新的数学字体。