To enable clear communication of mathematical expressions, GitHub supports LaTeX formatted math within Markdown. For more information, see LaTeX/Mathematics in Wikibooks.
GitHub'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 and the MathJax Accessibility Extensions Documentation.
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)$$
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.
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Within a math expression, add a
\symbol before the explicit$.This expression uses `\$` to display a dollar sign: $\sqrt{\$4}$
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Outside a math expression, but on the same line, use span tags around the explicit
$.To split <span>$</span>100 in half, we calculate $100/2$