Using a smaller subset symbol?

Question

I was looking at a paper and noticed they were using a thin subset symbol, like this:

I can't seem to find a command for this (and the corresponding symbol for \subseteq) online anywhere. How would I use this symbol?

Answer 1

Solution 1:

This might be what you look for:

\documentclass{article}
\let\mysub=\subset
\usepackage{mathabx}


\begin{document}
The original: $\mysub$

mathabx: $\subset$
\end{document}  

Solution 2:

I searched the definition of \subset in the mathabx package, and another solution without using this package is here:

\documentclass{article}

\DeclareFontFamily{U}{matha}{\hyphenchar\font45}
\DeclareFontShape{U}{matha}{m}{n}{
    <5> <6> <7> <8> <9> <10> gen * matha
    <10.95> matha10 <12> <14.4> <17.28> <20.74> <24.88> matha12
}{}
\DeclareSymbolFont{matha}{U}{matha}{m}{n}
\DeclareFontSubstitution{U}{matha}{m}{n}
\DeclareMathSymbol{\mysubset}{3}{matha}{"80}

\begin{document}
The original: $\subset$

Own symbol: $\mysubset$
\end{document}  

Answer 2

You could design your own thin subset symbol using \scalebox. Adjust the .8 scaling factor however you like.

\documentclass{article}
\usepackage{graphicx}

\newcommand{\thinsubset}{\mathrel{\scalebox{1}[.8]{$\subset$}}}
\newcommand{\thinsubseteq}{\mathrel{\scalebox{1}[.8]{$\subseteq$}}}

\begin{document}

$A\subset B\subseteq C$

$A\thinsubset B\thinsubseteq C$

\end{document}

A more complicated version, using \mathpalette will allow the symbol to be used as a subscript:

\documentclass{article}

\usepackage{graphicx}
\usepackage{amsmath}

\makeatletter
\newcommand{\thinsub}{\mathrel{\mathpalette\thin@sub\relax}}
\newcommand{\thin@sub}[2]{\m@th#1\text{\scalebox{1}[.8]{$\subset$}}}
\newcommand{\thinsubeq}{\mathrel{\mathpalette\thin@subeq\relax}}
\newcommand{\thin@subeq}[2]{\m@th#1\text{\scalebox{1}[.8]{$\subseteq$}}}
\makeatother

\newcommand{\thinsubset}{\mathrel{\scalebox{1}[.8]{$\subset$}}}
\newcommand{\thinsubseteq}{\mathrel{\scalebox{1}[.8]{$\subseteq$}}}

\begin{document}

$A\subset B\subseteq C_{A\subset B\subseteq C}$

$A\thinsub B\thinsubeq C_{A\thinsub B\thinsubeq C}$

\end{document}