[Tex/LaTex] Wrong emptyset symbol

math-modesymbols

Each time i type $\emptyset$ an ugly (if I may say so, I think it's ugly), or rather unexpected slashed circle comes out instead of the (expected) emptyset. I want my \emptyset! What should I do?

The packages that I use are:

\documentclass[12pt, a4paper]{report}  
\usepackage[utf8]{inputenc}   
\usepackage[T1]{fontenc}  
\usepackage{amsfonts, amsmath, amscd, amssymb, latexsym,amstext,amsthm}  
\usepackage[all]{xy}  
\usepackage{textcomp}  
\usepackage{mathabx}  
%\usepackage{MnSymbol}  
\usepackage{newlfont}  
%\usepackage{eufrak}  
\usepackage{bussproofs}  
\input{nprooftree.tex}  
\usepackage[english]{babel}  
\usepackage{pifont}   
\usepackage{verbatim}    
\usepackage{cmll}  
\usepackage{graphicx}  
\usepackage{tikz-cd}  
\graphicspath{ {images/} }

Best Answer

Remove mathabx to restore the default \emptyset.

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The manfnt package offers \mancube and \manimpossiblecube:

\documentclass{article}
\usepackage{manfnt}

\begin{document}

\mancube

\manimpossiblecube

\end{document}

enter image description here

Those commands won't directly work in math mode, but you can use a \mbox; something like this:

\documentclass{article}
\usepackage[T1]{fontenc}
\usepackage{euler}
\usepackage{manfnt}

\begin{document}

\[
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\]

\end{document}

enter image description here

Of course, you could define a command if you are going to use the cube several times:

\newcommand*\cube{\mbox{\mancube}}

[Tex/LaTex] Math Saturation Symbol

I'm not sure if this is what you want, but you can design your own symbol without tikz. Use \mathchoice to allow for use as a subscript or subsubscript.

Here is the code:

\documentclass{article}
\usepackage{calc} % needed to subtract from \hght

\newlength{\wdth}
\newlength{\hght}
\newlength{\dpth}

\newcommand{\sat}{\mathchoice%
{\settowidth{\wdth}{/}\settoheight{\hght}{/}\settodepth{\dpth}{/}%
    \rule[-\dpth]{.25em}{.09ex}\hspace{-.13\wdth}/%
    \hspace{-.15\wdth}\rule[\hght-.09ex]{.25em}{.09ex}}
{\settowidth{\wdth}{/}\settoheight{\hght}{/}\settodepth{\dpth}{/}%
    \rule[-\dpth]{.25em}{.09ex}\hspace{-.15\wdth}/%
    \hspace{-.15\wdth}\rule[\hght-.09ex]{.25em}{.09ex}}   
{\settowidth{\wdth}{$\scriptstyle /$}\settoheight{\hght}{$\scriptstyle /$}\settodepth{\dpth}{$\scriptstyle /$}%
    \rule[-\dpth]{.2em}{.08ex}\hspace{-.17\wdth}\scriptstyle /%
    \hspace{-.17\wdth}\rule[\hght-.08ex]{.2em}{.08ex}} 
{\settowidth{\wdth}{$\scriptstyle /$}\settoheight{\hght}{$\scriptscriptstyle /$}\settodepth{\dpth}{$\scriptscriptstyle /$}%
    \rule[-\dpth]{.15em}{.07ex}\hspace{-.19\wdth}\scriptscriptstyle /%
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}

\begin{document}

$A\sat B_{A\sat B_{A\sat B}}$

\end{document}

If you want longer or shorter tails you can adjust the lengths in the \rule parameters. The .25em (or .2em for subscript, .18em for subsubscript) controls the length.

Best Answer

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