It took me a bit to figure out how to get MathJax up and running to properly render equations in my posts.

First you need to run the MathJax script in a post. You can do this by putting the appropriate header in a post’s source file directly, or you can enable MathJax for all posts by putting it in the _include/head/custom.html header file setup by Minimal Mistakes.

  <script type="text/x-mathjax-config">
MathJax.Hub.Config({
TeX: {equationNumbers: {autoNumber: "AMS"}},
});
</script>

<script type="text/javascript"
src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.1/MathJax.js?config=TeX-MML-AM_CHTML">
</script>


The first block configures MathJax to use AMS equation numbering.

You could choose to use $ for inline math (which is not the default behavior). But this means you will have to trick MathJax into skipping any dollar-signs you want to render normally. It looks like this works: <span>$</span>. See the MathJax docs for more info. You would add the following to the MathJax.Hub.Config block, if you were so inclined.

  tex2jax: {inlineMath: [['$','$'], ['\$','\$']]}


Without the single dollar signs we must use  for inline math. Sadly all special characters must be escaped with \ for the html renderer to work right, so this must be entered as \$\$ in practice. You’ll also need to escape underscores \_ and astrisks \* (and a few other things). For some unknown reason I needed to use six \s for the newline to work in the align environment (I expected to need four).

## example math code

Here is an example block to see some functionality:

The Newtonian gravitational potential is defined as

\phi = - \frac{G M}{r} .

We can find the gravitational field by taking the gradient of the potential

$$\vec{g} = -\vec{\nabla}\phi.$$

The line element for Minkowski space is \$\mathrm{d}s^2 = -dt^2 + dx^2 + dy^2 + dz^2\$

Einstein's equations are

\$G\_{\mu\nu} = 8\pi\, T\_{\mu\nu} \$

in geometric units where \$G=c=1\$.

We can write Maxwell's equations in tensor form using the align environment
\begin{align\*}
\mathrm{d}\mathcal{F} & = 0, \\\\\\
^\*\mathrm{d} ^\*\mathcal{F} & = \mathcal{J}.
\end{align\*}


## renders as

The Newtonian gravitational potential is defined as

$$\phi = - \frac{G M}{r} .$$

We can find the gravitational field by taking the gradient of the potential

The line element for Minkowski space is $\mathrm{d}s^2 = -dt^2 + dx^2 + dy^2 + dz^2$

Einstein’s equations are

$G_{\mu\nu} = 8\pi\, T_{\mu\nu}$

in geometric units where $G=c=1$.

We can write Maxwell’s equations in tensor form using the align environment

\begin{align*} \mathrm{d}\mathcal{F} & = 0, \\
^*\mathrm{d} ^*\mathcal{F} & = \mathcal{J}. \end{align*}

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