How to write an infinity symbol in LaTeX?

# How to write an infinity symbol in LaTeX?

This post may contain affiliate links that allow us to earn a commission at no expense to you. Learn more

This article aims to show you a simple way to create an infinity symbol in LaTeX.

The infinity symbol can be seen most of the time in mathematics, like in limits or integrals involving boundaries. Thatâ€™s why today you will learn how to insert the latex infinity symbol in LaTeX.

Just as many other symbols, the infinity symbol is built-in to LaTeX, that means you donâ€™t need a package to write it in your document. The command is simple \infty, the math mode must be enabled (using the $to open and close it) and it does not take any value as argument. For example \begin{document} The$\infty$is beautiful \end{document}  ## Infinity symbols in mathematics The infinity symbol can be used in many math topics, you will see some typical examples including, intervals, limits, integrals, and summations. For example \begin{document} Dom$\in \left(-\infty , 0 \right]\$ %interval with infinity
%---------------------------
$$\lim_{x\to\infty} = \frac{x^2+x-1}{x-8}$$ %limit with infinity
%---------------------------
$$\int_{-\infty}^{\infty}e^{-x^2}dx$$ %integral with infinity
%---------------------------
$$\sum_{n=0}^{\infty}\frac{(-1)^n}{(2n+1)!}\,x^{2n+1}$$ %summation with infinity, the sine series
\end{document}


As you can see it is straightforward and simple, maybe there could be other packages that include the symbol, but donâ€™t complicate your LaTeX file if you donâ€™t need to.

Now you have the knowledge of how to insert the infinity symbol or sign in LaTeX and as a plus some direct application of the infinity in mathematics.

I hope this post was helpful. If you have any questions leave them in the comments.Â

And, as always, keep writing in LaTeX