# Strange symbol for two functions

I am translating one dyploma from english, so i find strange symbol

Help me find code for this, please

• Look here first: tex.stackexchange.com/questions/14/… – Davislor Jun 2 '19 at 17:17
• @Davislor, thanks a lot, service was useless, but i find vertical part of this symbol in symbol list - it is a \multimapdotbothvert from package "pxfonts". But know i cannot understand sybmols that looks like composition symbol in math(horizontal symbols) – taciturno Jun 2 '19 at 17:35

This seems to do it. Use a better name than \strangesymbol (somebody might suggest \zzz, but I don't recommend it).

\documentclass{article}
\usepackage{amsmath,graphicx}

\makeatletter
\newcommand{\strangesymbol}{%
\mathrel{\circ}%
\mathrel{\mathpalette\strange@symbol\relax}%
\mathrel{\circ}%
}

\newcommand{\strange@symbol}[2]{%
\vcenter{%
\m@th\offinterlineskip
\sbox\z@{\scalebox{0.7}{$#1\bullet$}}%
\ialign{\hfil##\hfil\cr
\usebox\z@\cr
\noalign{\kern-0.3\ht\z@}%
$#1|$\cr
\noalign{\kern-0.3\ht\z@}%
\usebox\z@\cr
}}%
}
\makeatother

\begin{document}

$f_j\strangesymbol f_k \qquad \sum_{f_j\strangesymbol f_k} x$

\end{document}


It took me more than an hour to invent this code because I had to find the right position for the symbols. I hope he's answered your question. In truth there is specific symbol \multimapdotbothvert from boisik package but if I put this in, I'm gonna lose the mathematical fonts of computer modern. I hope that I have answered your question.

\documentclass{article}
\usepackage{amsmath,amssymb,graphicx}
\newcommand\tdots{\mathrel{\boldsymbol{\cdot}\mkern-4mu{-}\mkern-4mu\boldsymbol{\cdot}}}
\begin{document}
$\sum_{\overset{\mkern-20mu f_j\circ \,\,\circ f_k}{}\mkern-35mu{\rotatebox{90} {\tdots}}}{[p_e(\rho \ldots)]}$
\end{document}

• Yes, i find this command also, but didnot have time to post it here) Thanks anyway. And one more: instead of package \boisik it allows to use \pxfonts. And little circles around this vertical symbol are \circ – taciturno Jun 2 '19 at 21:49