What is the name of this symbol?

Question

What is the name of this symbol and how I can write it using Latex?

Thanks in advance.

Answer 1

To 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}

Answer 2

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}