76 lines
3.1 KiB
Markdown
76 lines
3.1 KiB
Markdown
---
|
|
title: Writing mathematical expressions
|
|
intro: 'Use Markdown to display mathematical expressions on {% data variables.product.company_short %}.'
|
|
versions:
|
|
feature: math
|
|
shortTitle: Mathematical expressions
|
|
---
|
|
|
|
To enable clear communication of mathematical expressions, {% data variables.product.product_name %} supports LaTeX formatted math within Markdown. For more information, see [LaTeX/Mathematics](http://en.wikibooks.org/wiki/LaTeX/Mathematics) in Wikibooks.
|
|
|
|
{% data variables.product.company_short %}'s math rendering capability uses MathJax; an open source, JavaScript-based display engine. MathJax supports a wide range of LaTeX macros, and several useful accessibility extensions. For more information, see [the MathJax documentation](http://docs.mathjax.org/en/latest/input/tex/index.html#tex-and-latex-support) and [the MathJax Accessibility Extensions Documentation](https://mathjax.github.io/MathJax-a11y/docs/#reader-guide).
|
|
|
|
## Writing inline expressions
|
|
|
|
To include a math expression inline with your text, delimit the expression with a dollar symbol `$`.
|
|
|
|
```
|
|
This sentence uses `$` delimiters to show math inline: $\sqrt{3x-1}+(1+x)^2$
|
|
```
|
|
|
|
|
|
|
|
## Writing expressions as blocks
|
|
|
|
To add a math expression as a block, start a new line and delimit the expression with two dollar symbols `$$`.
|
|
|
|
```
|
|
**The Cauchy-Schwarz Inequality**
|
|
|
|
$$\left( \sum_{k=1}^n a_k b_k \right)^2 \leq \left( \sum_{k=1}^n a_k^2 \right) \left( \sum_{k=1}^n b_k^2 \right)$$
|
|
```
|
|
|
|
|
|
|
|
{% ifversion math-fenced-blocks %}
|
|
|
|
Alternatively, you can use the <code>\`\`\`math</code> code block syntax to display a math expression as a block. With this syntax, you don't need to use `$$` delimiters.
|
|
|
|
````
|
|
**Here is some math!**
|
|
|
|
```math
|
|
\sqrt{3}
|
|
```
|
|
````
|
|
|
|
|
|
|
|
{% endif %}
|
|
|
|
## Writing dollar signs in line with and within mathematical expressions
|
|
|
|
To display a dollar sign as a character in the same line as a mathematical expression, you need to escape the non-delimiter `$` to ensure the line renders correctly.
|
|
|
|
- Within a math expression, add a `\` symbol before the explicit `$`.
|
|
|
|
```
|
|
This expression uses `\$` to display a dollar sign: $\sqrt{\$4}$
|
|
```
|
|
|
|
|
|
|
|
- Outside a math expression, but on the same line, use span tags around the explicit `$`.
|
|
|
|
```
|
|
To split <span>$</span>100 in half, we calculate $100/2$
|
|
```
|
|
|
|
|
|
|
|
## Further reading
|
|
|
|
* [The MathJax website](http://mathjax.org)
|
|
* [Getting started with writing and formatting on GitHub](/get-started/writing-on-github/getting-started-with-writing-and-formatting-on-github)
|
|
* [GitHub Flavored Markdown Spec](https://github.github.com/gfm/)
|