I am trying to insert the symbol in the title of the question, which I copied from a PDF article, but it appears as space in the output file. What is the corresponding LaTeX command?
[Tex/LaTex] the LaTeX command for “em dash” (—)
punctuationsymbols
Related Solutions
Every character can be turned into a command in math mode, but some special tricks are needed.
\documentclass{article}
\usepackage{xcolor}
\begingroup\lccode`~=`=
\lowercase{\endgroup\def~}{\mathrel{\textcolor{green}{\standardequals}}}
\edef\standardequals{\mathchar\the\mathcode`=\relax}
\AtBeginDocument{\mathcode`=\string"8000 }
\begin{document}
$a=b$
\end{document}
The following example constructs the symbol in the following way:
- The top part with the round line end of the vertical bar is used as branch line.
- The length of the branch is the same as in the plus symbol. But the length can
be changed by redefining
\UpDownYFactorto a value different than1. - The intersection point is the same as in the plus symbol at the mathematical center axis.
- The symbol adopts in size to the current math style.
- The side bearings have the same width as in the plus symbol.
- The names for the provided symbols are the same as in package
MnSymbol:\upYand\downY. - The symbols act as binary operators. It can be changed by replacing
\mathbin.
Example file:
\documentclass{article}
\usepackage{graphicx}
\usepackage{trimclip}
\makeatletter
\providecommand*{\upY}{%
\mathbin{%
\mathpalette\@updownY{0}%
}%
}
\providecommand*{\downY}{%
\mathbin{%
\mathpalette\@updownY{1}%
}%
}
\providecommand*{\UpDownYFactor}{1}
\newcommand*{\@updownY}[2]{%
% #1: math style
% #2: 0 = up, 1 = down
\sbox0{$#1+\m@th$}%
\dimen2=.5\dimexpr\wd0-\ht0-\dp0\relax
% => \dimen2: side bearing
\sbox2{$#1\vcenter{}$}%
\dimen4=\dimexpr\ht0-\ht2\relax
% => \dimen4: branch length
\setbox0=\hbox to 0pt{%
\hss
\clipbox{%
0pt %
{\dimexpr\totalheight-\UpDownYFactor\dimen4\relax} %
0pt %
-\dimen2%
}{$#1|$}%
\hss
}%
\ht0=\dimexpr\ht0-\dimen2\relax
\kern\dimen2 %
\raise\ht2\hbox{%
\ifnum#2=0 %
{\rotatebox{120}{\copy0}}%
\copy0 %
{\rotatebox{-120}{\copy0}}%
\else
{\rotatebox{60}{\copy0}}%
{\rotatebox{180}{\copy0}}%
{\rotatebox{-60}{\copy0}}%
\fi
}%
\kern\dimen2 %
}
\makeatother
\begin{document}
\[\begin{array}{c}
a \upY b \downY c
\\
\scriptstyle
a \upY b \downY c
\\
\scriptscriptstyle
a \upY b \downY c
\\
\rlap{$\upY$}{\downY}
\end{array}\]
\end{document}
For analyzing the center:
\usepackage{pdfrender}
...
\[
\rlap{%
\sbox0{$\vcenter{}$}%
\sbox2{${\upY}{\downY}{\upY}$}%
\raise\ht0\hbox{\vrule height.01pt depth.01pt width\wd2}%
}%
\pdfrender{TextRenderingMode=Stroke, LineWidth=.01pt}
{\upY}\rlap{$\upY$}{\downY}{\downY}
\]
Best Answer
The LaTeX command for such a line are three small ones:
---