---
title: LaTeX
tags:
Quartz uses Katex by default to typeset both inline and block math expressions at build time.
Block math can be rendered by delimiting math expression with $$.
$$
f(x) = \int_{-\infty}^\infty
f\hat(\xi),e^{2 \pi i \xi x}
\,d\xi
$$
$$
f(x) = \int_{-\infty}^\infty
f\hat(\xi),e^{2 \pi i \xi x}
\,d\xi
$$
$$
\begin{aligned}
a &= b + c \ &= e + f \
\end{aligned}
$$
$$
\begin{bmatrix}
1 & 2 & 3 \
a & b & c
\end{bmatrix}
$$
$$
\begin{array}{rll}
E \psi &= H\psi & \text{Expanding the Hamiltonian Operator} \
&= -\frac{\hbar^2}{2m}\frac{\partial^2}{\partial x^2} \psi + \frac{1}{2}m\omega x^2 \psi & \text{Using the ansatz $\psi(x) = e^{-kx^2}f(x)$, hoping to cancel the $x^2$ term} \
&= -\frac{\hbar^2}{2m} [4k^2x^2f(x)+2(-2kx)f'(x) + f''(x)]e^{-kx^2} + \frac{1}{2}m\omega x^2 f(x)e^{-kx^2} &\text{Removing the $e^{-kx^2}$ term from both sides} \
& \Downarrow \
Ef(x) &= -\frac{\hbar^2}{2m} [4k^2x^2f(x)-4kxf'(x) + f''(x)] + \frac{1}{2}m\omega x^2 f(x) & \text{Choosing $k=\frac{im}{2}\sqrt{\frac{\omega}{\hbar}}$ to cancel the $x^2$ term, via $-\frac{\hbar^2}{2m}4k^2=\frac{1}{2}m \omega$} \
&= -\frac{\hbar^2}{2m} [-4kxf'(x) + f''(x)] \
\end{array}
$$
[!warn]
Due to limitations in the underlying parsing library, block math in Quartz requires the$$delimiters to be on newlines like above.
Similarly, inline math can be rendered by delimiting math expression with a single $. For example, $e^{i\pi} = -1$ produces $e^{i\pi} = -1$
There will be cases where you may have more than one $ in a paragraph at once which may accidentally trigger MathJax/Katex.
To get around this, you can escape the dollar sign by doing \$ instead.
For example:
I have $1 and you have $2 produces I have $1 and you have $2I have \$1 and you have \$2 produces I have \$1 and you have \$2Add the following import to the top of quartz/plugins/transformers/latex.ts (before all the other
imports):
import "katex/contrib/mhchem"
Latex parsing is a functionality of the [[plugins/Latex|Latex]] plugin. See the plugin page for customization options.