Test Page for Math Fomulas

$\text{KaTeX}LATEXTEX$

$$\{\begin{array}{lll}\frac{\partial \mathcal{D}}{\partial t}& =\mathrm{\nabla }\times \mathcal{H},& \text{(Loi de Faraday)}\\ \frac{\partial \mathcal{B}}{\partial t}& =-\mathrm{\nabla }\times \mathcal{E},& \text{(Loi d’Ampere)}\\ \mathrm{\nabla }\cdot \mathcal{B}& =0,& \text{(Loi de Gauss)}\\ \mathrm{\nabla }\cdot \mathcal{D}& =0.& \text{(Loi de Colomb)}\end{array}$$

Line Breaks

They must appear inside certain environments.

$$\begin{gathered} 1 \\ 2 \end{gathered}$$
$1\\2$

$\begin{array}{c}1\\ 2\end{array}$
$\displaylines{1\\2}$

$\begin{array}{r}1\\ 2\end{array}$
$\begin{aligned} 1\\2 \end{aligned}$

Defining Macros

When the characters { and # appear together, all following content will be discarded due to a Hexo bug

$$
$H_{2}O,H_{2}O,\underset{n\to \mathrm{\infty }}{lim}$

$\newcommand{\water}{H_2O} \def\wate{H_2O}\def\liminfty#1{\lim_{ #1\to\infty}}$
$\water,\wate,\liminfty n$

Equation Labeling

$\begin{array}{}\text{(1)}& 1\end{array}$
$\begin{array}{}\text{(2)}& 1\end{array}$

$$\begin{array}{}\text{(b)}& 2\end{array}$$

$\text{2},\text{b}$

$\begin{equation}1\end{equation}$
$\begin{equation}1\label{asd.sdsd}\end{equation}$
$$2\tag{b}\label{l2}$$
$\ref{asd.sdsd},\ref{l2}$

You must define am equation label before referencing it.

The hyper link for labeled equation is {postURL}#mjx-eqn%3A{label} — where spaces are replaced with underscores — according to the MathJax3.2 Documentation

Enabling Extension Packs

colorv2:

$redblue$

$\color{red}{red\color{ #0000ff}{blue}}$

physics:

${\sin x\phantom{\int }|}_0^{\pi }$

$\eval{\sin x}_0^\pi$

setoptions:

$\overrightarrow{\mathbf{\nabla }}\mathbf{\nabla }$

$\setOptions[physics]{arrowdel=true} \grad \setOptions[physics]{arrowdel=false} \grad$

Note: require and autoload will not work properly — avoid using them.