Discourse has recently released a math plugin which has now been enabled for QuantEcon

You can use `$$`

for display math and `$`

for inline math

For example: `$\phi = 0.5$`

while render inline \phi = 0.5 and

```
$$
\int_{a}^{b} x^2 dx
$$
```

will render as a display formula

\int_{a}^{b} x^2 dx