更换Hexo默认MD渲染器，支持数学公式渲染

npm uninstall hexo-renderer-marked --save

npm install hexo-renderer-pandoc --save

apt install pandoc

pandoc -v

pandoc 2.17.1.1
Compiled with pandoc-types 1.22.2.1, texmath 0.12.4, skylighting 0.12.3.1,
citeproc 0.6.0.1, ipynb 0.2
User data directory: /root/.local/share/pandoc
Copyright (C) 2006-2022 John MacFarlane. Web:  https://pandoc.org
This is free software; see the source for copying conditions. There is no
warranty, not even for merchantability or fitness for a particular purpose.

pandoc:
  pandocPath: C:/Program Files/Pandoc/pandoc.exe

npm install hexo-filter-mathjax --save

---
title: On the Electrodynamics of Moving Bodies
categories: Physics
date: 1905-06-30 12:00:00
mathjax: true
---

mathjax:
  tags: none # or 'ams' or 'all'
  single_dollars: true # enable single dollar signs as in-line math delimiters
  cjk_width: 0.9 # relative CJK char width
  normal_width: 0.6 # relative normal (monospace) width
  append_css: true # add CSS to pages rendered by MathJax
  every_page: true # if true, every page will be rendered by MathJax regardless the `mathjax` setting in Front-matter
  packages: # extra packages to load
  extension_options: {}
    # you can put your extension options here
    # see http://docs.mathjax.org/en/latest/options/input/tex.html#tex-extension-options for more detail

$$
i\hbar\frac{\partial}{\partial t}\psi=-\frac{\hbar^2}{2m}\nabla^2\psi+V\psi
$$

$$
\begin{eqnarray*}
\nabla\cdot\vec{E}&=&\frac{\rho}{\epsilon_0}\\
\nabla\cdot\vec{B}&=&0\\
\nabla\times\vec{E}&=&-\frac{\partial B}{\partial t}\\
\nabla\times\vec{B}&=&\mu_0\left(\vec{J}+\epsilon_0\frac{\partial E}{\partial t}\right)
\end{eqnarray*}
$$