How do I type the ground symbol ⏚ in LaTeX?
I am not trying to create a ground node in a circuit diagram (which is answered in a different question). Instead, I just want to be able to type the symbol ⏚ in math mode.
[Tex/LaTex] How to typeset the ground symbol ⏚ in LaTeX
engineeringmath-modesymbols
Related Solutions
The undertilde package provides extensible tilde accents under elements in math mode via \utilde{<symbols>}. Try, for example:
\documentclass{minimal}
\usepackage{undertilde}
\begin{document}
This is $\frac{\utilde{ab}}{c} \neq \frac{ab}{c}$ and so on.
\end{document}
Alternatively, as @egreg suggests, the accents package provides \underaccent[<accent>]{<symbol>}. Try, for example:
\documentclass{minimal}
\usepackage{accents}
\begin{document}
This is $\underaccent{\tilde}{\mathcal{A}}$ and so on.
\end{document}
See page 2 of the package documentation in order to extend this using \widetilde rather than \tilde. It depends on your preference.
This solution demonstrates how an \includegraphics approach could be made to work conveniently.
If the new symbol should conform to the vertical extent of an existing glyph, then this approach will work handily. In the MWE, I make the symbol \schtreber conform to the height of a "b" and then a "g", respectively. It will scale with math style.
If the symbol is a relation or operator, the definition could include a \mathrel or \mathop.
\documentclass{article}
\usepackage{scalerel}
\begin{document}
\def\schtreber{\scalerel*{\includegraphics{schtreber}}{b}}
$ab\schtreber c \scriptscriptstyle ab\schtreber c$
$ y = x^{\schtreber}$
\def\schtreber{\scalerel*{\includegraphics{schtreber}}{g}}
$ab\schtreber c \scriptscriptstyle ab\schtreber c$
$ y = x^{\schtreber}$
\end{document}
If the vertical extent is to be arbitrary, a \rule may be used for the target size, where \LMpt (local-mathstyle pts) or \LMex (local-mathstyle ex's) are used to define the dimensions of the rule. Here I place the image in a \savebox initially, in the event that some flavors of TeX don't save a local copy from \includegraphics.
\documentclass{article}
\usepackage{scalerel}
\newsavebox\schtreberbox
\savebox\schtreberbox{\includegraphics{schtreber}}
\def\schtreber{\scalerel{\usebox{\schtreberbox}}{\rule[-2\LMpt]{0pt}{8\LMpt}}}
\begin{document}
$ab\schtreber c \scriptscriptstyle ab\schtreber c$\par
$ y = x^{\schtreber}$
\end{document}
The advantage of the former, rather than the latter approach is that the method will also work in both text and math mode, as expected:
\documentclass{article}
\usepackage{scalerel}
\newsavebox\schtreberbox
\savebox\schtreberbox{\includegraphics{schtreber}}
\def\schtreber{\scalerel*{\usebox{\schtreberbox}}{b}}
\begin{document}
$ab\schtreber c \scriptscriptstyle ab\schtreber c$\par
$ y = x^{\schtreber}$
In text\schtreber, \LARGE text\schtreber.
\end{document}
Best Answer
One option is to define a command for this symbol taking it, for example, from the
circuits.ee.IEClibrary (I wasn't sure if this symbol should be ord, rel, bin, so I opted for bin; also, there was no information about size or baseline position, but all these attributes can easily be adjusted):Another option: this is listed as Unicode character
'EARTH GROUND' (U+23DA), so you could use XeLaTeX and a font supporting the symbol:fileformat.infohas alist of possible fonts supporting the symbol.