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authorKarl Hallsby <karl@hallsby.com>2021-10-03 02:16:25 -0500
committerKarl Hallsby <karl@hallsby.com>2021-10-03 02:16:55 -0500
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parente2c06d2681e18946ab6c3e3e6075aed92a4d13be (diff)
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----
-layout: post
-title: a post with math
-date: 2015-10-20 11:12:00-0400
-description: an example of a blog post with some math
----
-This theme supports rendering beautiful math in inline and display modes using [MathJax 3](https://www.mathjax.org/){:target="\_blank"} engine. You just need to surround your math expression with `$$`, like `$$ E = mc^2 $$`. If you leave it inside a paragraph, it will produce an inline expression, just like $$ E = mc^2 $$.
-
-To use display mode, again surround your expression with `$$` and place it as a separate paragraph. Here is an example:
-
-$$
-\sum_{k=1}^\infty |\langle x, e_k \rangle|^2 \leq \|x\|^2
-$$
-
-You can also use `\begin{equation}...\end{equation}` instead of `$$` for display mode math.
-MathJax will automatically number equations:
-
-\begin{equation}
-\label{eq:caushy-shwarz}
-\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)
-\end{equation}
-
-and by adding `\label{...}` inside the equation environment, we can now refer to the equation using `\eqref`.
-
-Note that MathJax 3 is [a major re-write of MathJax](https://docs.mathjax.org/en/latest/upgrading/whats-new-3.0.html){:target="\_blank"} that brought a significant improvement to the loading and rendering speed, which is now [on par with KaTeX](http://www.intmath.com/cg5/katex-mathjax-comparison.php){:target="\_blank"}.