What is the name of this symbol and how I can write it using Latex?
Thanks in advance.
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Sign up to join this communityTo me this looks exactly like a mirrored P merged with a normal P. I couldn't find it with Detexify, but it's not hard to construct.
\documentclass{article}
\usepackage{graphicx}
\newlength{\fslength}
\makeatletter
\newcommand{\funnyP}{%
\setlength{\fslength}{\f@size pt}%
\reflectbox{P}\hspace*{-.359\fslength}\mbox{P}%
}
\makeatother
\begin{document}
\( \funnyP \)
{\small \funnyP}
{\funnyP}
{\Large \funnyP}
{\Huge \funnyP}
\end{document}
That symbol is qp ligature that is a combination of q and p (or c and p, or mirrored p and p). Perhaps here the symbol is in uppercase form. The Unicode of this symbol (in lowercase form) is U+0239 which can be used in tex engines other than pdflatex.
Here's another solution for using in normal latex which make use of \reflectbox
to mirror P letter like this
A command like \qpligature
can be defined as in the code below and used in either text or math mode:
\documentclass{article}
\usepackage{amsmath,graphicx}
%
\newcommand{\qpligature}{\ensuremath{\reflectbox{\text{P}}\mkern-6mu\text{P}}}
%
\begin{document}
%
%
\section{Text mode}
In text mode with different size:
\qpligature \quad \large \qpligature \quad \Large \qpligature \quad \huge \qpligature
%
\normalsize
\section{Math mode}
In inline equations $ \qpligature = q p $
In separate equations:
%
\begin{align*}
\qpligature = q p
\end{align*}
%
\huge
%
\begin{align*}
\qpligature = q p
\end{align*}
%
\end{document}