Math and code

Math

$…$ is an inline formula and $$…$$ a display formula:

The famous one is $E=mc^2$, and this is a display formula:

$$
\int_0^\infty e^{-x^2}\,dx = \frac{\sqrt{\pi}}{2}
$$

• The delimiter rules are Marp Core’s, read from marp-core 4.4.0: a $ followed by a space does not open a formula, and one followed by a digit does not close it, so prices such as $5 and $10 stay text.
• go-tex/math typesets each formula into inline SVG sized in em, so it follows the text’s size and sits on its baseline. The same SVG is used in the HTML page, in images and in the PDF.
• A formula that does not parse stays visible as written; the error is kept in its title.

Code

Fenced code blocks are coloured by go-rouge, which writes highlight.js class names, the ones Marp’s themes style:

```go
fmt.Println("hello")
```

A language go-rouge does not know is written as plain text, as Marp Core does.

Fonts

Lato Regular, Bold, Black and italics and Roboto Mono Regular, Bold and italics are embedded, so gaia’s headings get their weight and italic text renders italic.