Symbol like '\propto' but inverted

Question

I'm looking for a symbol like \propto but rotated 180 degrees (or even better, a symbol like the pink ribbon rotated in -90 degrees) but can't find it anywhere.

Im looking for somthing similar to the following picture:

(again, if it resembles the pink ribbon rotated moreso than an chopped infinity, it's better but anything of this form will do). How could I make one such symbol?

Answer 1

You can use commands from the package graphicx to do the rotation.

\documentclass{article}
\usepackage{graphicx}

\newcommand{\proptoinverse}{\mathrel{\mskip1mu\reflectbox{$\propto$}\mskip-1mu}}

\begin{document}

$A \propto B$

$A \proptoinverse B$

\end{document}

Answer 2

Certainly not supported by all fonts, but Unicode actually does have a “Reminder Ribbon“ (U+1F397) character: 🎗

Try this (compiled with LuaLaTeX):

\documentclass{article}
\usepackage{fontspec}
\usepackage{graphicx,xcolor}

\setmainfont{Noto Sans}
\newfontfamily{\emojifont}{NotoEmoji-Regular.ttf}   
% Get it here: https://fonts.google.com/noto/specimen/Noto+Emoji

\begin{document}
\begin{center}

    \Large Behold my regular ribbon … \newline
    \fontsize{65}{80}\selectfont    % U+1F397   REMINDER RIBBON
    {\emojifont\symbol{"1F397}}

    \Large … and my newly rotated pink ribbon! \newline
    \fontsize{65}{80}\selectfont    % U+1F397   REMINDER RIBBON
    \vspace{-5cm}\par
    \rotatebox{270}{\emojifont\color{pink}{\symbol{"1F397}}}

\end{center}
\end{document}