How to write an infinity symbol in LaTeX?

How to write an infinity symbol in LaTeX?

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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. That’s why today you will learn how to insert the latex infinity symbol in LaTeX.

LaTeX infinity symbol

Just as many other symbols, the infinity symbol is built-in to LaTeX, that means you don’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

The $\infty$ is beautiful
infinity symbol in LaTeX
\infty output 

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

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
infinity symbol in LaTeX
Different expression using \infty

As you can see it is straightforward and simple, maybe there could be other packages that include the symbol, but don’t complicate your LaTeX file if you don’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. 

And, as always, keep writing in LaTeX

Further Reading

LaTex Tutorial on Symbols

  1. How To Create A Cross Product Symbol In LaTeX
  2. How to create a hat symbol in LaTeX?
  3. How to create a prime symbol in LaTeX?
  4. How to create an absolute value symbol in LaTeX?
  5. How to create an approximate symbol in LaTeX?
  6. How to create an intersection symbol in LaTeX?
  7. How to create the empty set symbol in LaTeX?
  8. How to write a degree symbol in LaTeX?
  9. How to write a dot product in LaTeX?
  10. How to Write a Greater Than Symbol in LaTeX?
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  26. How To Write The Greater Than Or Equal To Symbol In LaTeX?
  27. How to write the integer number symbol in LaTeX?
  28. How to write the less than symbol in LaTeX?
  29. How to write the Natural numbers symbol in LaTeX?
  30. How to write the parallel symbol in LaTeX?
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  33. How To Write The Symbol For A Subset In LaTeX?
  34. How to write the symbol for therefore in LaTeX?
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Joannah W.
Joannah has been a science publisher with close to 20 years of experience. She wants to help students and researchers stay ahead of the trends and developments in the science community by making science more accessible to everyone.

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