# Infinity Symbol

## This post is one of LaTeX math symbols series, which highlights different methods to include infinity symbols in our document. This includes simple infinity symbol, half infinity, acid free symbol (infinity inside a circle), etc.

Let us discuss each one of them one by one.

## Infinity in LaTeX

The infinity symbol refers to having no boundaries or boundless. Two packages can be used to display an infinity symbol: amsmath and stix. To get the infinity symbol in LaTeX, we use the command \infty, which is the same under both packages.

% Infinity symbol in LaTeX
\documentclass{article}

% Math package
\usepackage{amsmath}

\begin{document}

This is the infinity symbol $\infty$.

\end{document}

Compiling this code yields:

Using the above code and with stix package, we get the following output:

## Half infinity symbol in LaTeX

The half infinity symbol, denoted ∝, can be obtained in LaTeX using the command  \propto. This symbol is generally used to represent proportional quantities. Check the following code:

% Half infinity symbol in LaTeX
\documentclass{article}

\begin{document}

This is the infinity symbol $\propto$.

\end{document}

Compiling this code yields:

## Infinity circle in LaTeX

Acid free symbol corresponds to an infinity symbol inside a circle ♾ . In LaTeX, acid free symbol is obtained by the command \acidfree provided by stix package. Check the following example:

% Acid free symbol in LaTeX
\documentclass{article}

% Required package
\usepackage{stix}

\begin{document}

This is the infinity symbol $\acidfree$.

\end{document}

Output:

## Incomplete infinity in LaTeX

Incomplete infinity symbol (or broken infinity symbol), denoted ⧜, can be obtained in LaTeX using the command \iinfin provided by stix package. Check the following example:

% Incomplete infinity symbol
\documentclass{article}

% Required package
\usepackage{stix}

\begin{document}

This is incomplete infinity symbol in \LaTeX{} $\iinfin$.

\end{document}

Compiling this code yields:

## Tie over infinity in LaTeX

The tie over infinity symbol ( ⧝ ) in LaTeX is obtained by the command \tieinfty provided by stix package. Check the following code:

% Tie over infinity in LaTeX
\documentclass{article}

% Required package
\usepackage{stix}

\begin{document}

This is tie over infinity symbol in \LaTeX{}: $\tieinfty$.

\end{document}

Output:

## Infinity negated with vertical bar

The infinity negated with vertical bar symbol in LaTeX can be obtained by the command \nvinfty provided by stix package. Check the following code:

% Infinity negated with vertical bar
\documentclass{article}

% Required package
\usepackage{stix}

\begin{document}

This is the negated infinity symbol with vertical bars, $\nvinfty$.

\end{document}

Compiling this code yields:

## Conclusion

In this post, we have highlighted different infinity symbols and their LaTeX commands. Stay tuned for more in depth tutorials and don’t forget to share with others if this has added value to you!