参考链接：

https://blog.csdn.net/mingzhuo_126/article/details/82722455

https://zhuanlan.zhihu.com/p/262900046

https://blog.csdn.net/liyuanbhu/article/details/51473886

https://blog.csdn.net/luolang_103/article/details/81289529

https://blog.csdn.net/weixin_42301220/article/details/109817603

1.打开Typora选择数学模块

• 点击“段落”—>“公式块”
• 快捷键Ctrl+Shift+m
• “$$”+回车

以上三种方式都能打开数学公式的编辑栏，如下：

Typora可以使用行内公式，行内公式需要开启设置。

具体操作：文件→偏好设置→Markdown，勾选内联公式，重启typora。

输入，按Esc键会自动在后面加上一个，然后在这两个之间输入公式。

案例如下：

2. 添加数学公式

输出美观规范的数学公式，要清楚它们的格式和代码，在编辑栏中输入代码，对应的公式会在下面实时显示。

3.常用公式的代码

3.1.上/下标

算式	Markdown
\(x^{2}\)	x^2
\(y_1\)	y_1
\(\overset{?}=\)	\overset{?}= (表达式上方插入符号)
\(\underset{0 \le j \le k-1}{\arg \min}\)	\underset{0 \le j \le k-1}{\arg \min} (表达式下方插入符号)

3.2.分式

算式	Markdown
1/2	1/2
$\frac{1}{2} $	\frac{1}{2}

3.3.点符号

算式	Markdown
\(\cdots\)	\cdots
\(\cdot\)	\cdot
\(\vdots\)	\vdots
$ \ddots$	\ddots

3.4.开根号

算式	Markdown
\(\sqrt{2}\)	\sqrt{2}
\(\sqrt[a]{b}\)	\sqrt[a]{b}

3.5.矢量

算式	Markdown
\(\vec{a}\)	\vec{a}

3.6.积分

算式	Markdown
\(\int{x}dx\)	\int{x}dx
\(\int_{1}^{2}{x}dx\)	\int_{1}^{2}{x}dx

3.7.极限

算式	Markdown
\(\lim{a+b}\)	\lim{a+b}
\(\lim_{n \rightarrow +\infty}\)	\lim_{n \rightarrow +\infty}

3.8.累加

算式	Markdown
\(\sum{a}\)	\sum{a}
\(\sum_{n=1}^{100}{a_n}\)	\sum_{n=1}^{100}{a_n}

3.9.累乘

算式	Markdown
\(\prod{x}\)	\prod{x}
\(\prod_{n=1}^{99}{x_n}\)	\prod_{n=1}^{99}{x_n}

3.10.希腊字母

大写	Markdown	小写	Markdown
\(A\)	A	\(\alpha\)	\alpha
\(B\)	B	\(\beta\)	\beta
\(\Gamma\)	\Gamma	\(\gamma\)	\gamma
\(\Delta\)	\Delta	\(\delta\)	\delta
\(E\)	E	\(\epsilon\)	\epsilon
		\(\varepsilon\)	\varepsilon
\(Z\)	Z	\(\zeta\)	\zeta
\(H\)	H	\(\eta\)	\eta
\(\Theta\)	\Theta	\(\theta\)	\theta
\(I\)	I	\(\iota\)	\iota
\(K\)	K	\(\kappa\)	\kappa
\(\Lambda\)	\Lambda	\(\lambda\)	\lambda
\(M\)	M	\(\mu\)	\mu
\(N\)	N	\(\nu\)	\nu
\(\Xi\)	\Xi	\(\xi\)	\xi
\(O\)	O	\(\omicron\)	\omicron
\(\Pi\)	\Pi	\(\pi\)	\pi
\(P\)	P	\(\rho\)	\rho
\(\Sigma\)	\Sigma	\(\sigma\)	\sigma
\(T\)	T	\(\tau\)	\tau
\(\Upsilon\)	\Upsilon	\(\upsilon\)	\upsilon
\(\Phi\)	\Phi	\(\phi\)	\phi
		\(\varphi\)	\varphi
\(X\)	X	\(\chi\)	\chi
\(\Psi\)	\Psi	\(\psi\)	\psi
\(\Omega\)	\Omega	\(\omega\)	\omega

3.11.三角函数

三角函数	Markdown
\(\sin\)	\sin
\(\arcsin\)	\arcsin
\(\tan\)	\tan

3.12.对数函数

算式	Markdown
\(\ln2\)	\ln2
\(\log_28\)	\log_28
\(\lg10\)	\lg10

3.13.关系运算符

运算符	Markdown
\(\pm\)	\pm
\(\times\)	\times
\(\cdot\)	\cdot
\(\div\)	\div
\(\neq\)	\neq
\(\equiv\)	\equiv
\(\leq\)	\leq
\(\geq\)	\geq
\(\ll\)	\ll
\(\gg\)	\gg
\(\lll\)	\lll
\(\ggg\)	\ggg
\(<\)	<
\(>\)	>
\(\triangleq\)	\triangleq

3.14.其它特殊字符

符号	Markdown
\(\forall\)	\forall
\(\infty\)	\infty
\(\emptyset\)	\emptyset
\(\exists\)	\exists
\(\nabla\)	\nabla
\(\bot\)	\bot
\(\angle\)	\angle
\(\because\)	\because
\(\therefore\)	\therefore
\(\part\)	\part
\(\in\)	\in
\(\cup\)	\cup
\(\cap\)	\cap
\(\subset\)	\subset
\(\subseteq\)	\subseteq
\(\supset\)	\supset
\(\sim\)	\sim
\(\varnothing\)	\varnothing
\(\lnot\)	\lnot
\(\notin\)	\notin

3.15.箭头符号

符号	Markdown
\(\uparrow\)	\uparrow
\(\downarrow\)	\downarrow
\(\Uparrow\)	\Uparrow
\(\Downarrow\)	\Downarrow
\(\updownarrow\)	\updownarrow
\(\Updownarrow\)	\Updownarrow
\(\rightarrow\)	\rightarrow
\(\leftarrow\)	\leftarrow
\(\Rightarrow\)	\Rightarrow
\(\Leftarrow\)	\Leftarrow
\(\leftrightarrow\)	\leftrightarrow
\(\Leftrightarrow\)	\Leftrightarrow
\(\longrightarrow\)	\longrightarrow
\(\longleftarrow\)	\longleftarrow
\(\Longrightarrow\)	\Longrightarrow
\(\Longleftarrow\)	\Longleftarrow
\(\longleftrightarrow\)	\longleftrightarrow
\(\Longleftrightarrow\)	\Longleftrightarrow
\(\mapsto\)	\mapsto
\(\longmapsto\)	\longmapsto
\(\hookleftarrow\)	\hookleftarrow
\(\hookrightarrow\)	\hookrightarrow
\(\leftharpoonup\)	\leftharpoonup
\(\rightharpoonup\)	\rightharpoonup
\(\leftharpoondown\)	\leftharpoondown
\(\rightharpoondown\)	\rightharpoondown
\(\rightleftharpoons\)	\rightleftharpoons
\(\leadsto\)	\leadsto
\(\nearrow\)	\nearrow
\(\searrow\)	\searrow
\(\swarrow\)	\swarrow
\(\nwarrow\)	\nwarrow
\(\nleftarrow\)	\nleftarrow
\(\nrightarrow\)	\nrightarrow
\(\nLeftarrow\)	\nLeftarrow
\(\nRightarrow\)	\nRightarrow
\(\nleftrightarrow\)	\nleftrightarrow
\(\nLeftrightarrow\)	\nLeftrightarrow
\(\dashrightarrow\)	\dashrightarrow
\(\dashleftarrow\)	\dashleftarrow
\(\leftleftarrows\)	\leftleftarrows
\(\leftrightarrows\)	\leftrightarrows
\(\Lleftarrow\)	\Lleftarrow
\(\twoheadleftarrow\)	\twoheadleftarrow
\(\leftarrowtail\)	\leftarrowtail
\(\looparrowleft\)	\looparrowleft
\(\leftrightharpoons\)	\leftrightharpoons
\(\curvearrowleft\)	\curvearrowleft
\(\circlearrowleft\)	\circlearrowleft
\(\Lsh\)	\Lsh
\(\upuparrows\)	\upuparrows
\(\upharpoonleft\)	\upharpoonleft
\(\downharpoonleft\)	\downharpoonleft
\(\multimap\)	\multimap
\(\leftrightsquigarrow\)	\leftrightsquigarrow
\(\rightrightarrows\)	\rightrightarrows
\(\rightleftarrows\)	\rightleftarrows
\(\rightrightarrows\)	\rightrightarrows
\(\rightleftarrows\)	\rightleftarrows
\(\twoheadrightarrow\)	\twoheadrightarrow
\(\rightarrowtail\)	\rightarrowtail
\(\looparrowright\)	\looparrowright
\(\rightleftharpoons\)	\rightleftharpoons
\(\curvearrowright\)	\curvearrowright
\(\circlearrowright\)	\circlearrowright
\(\Rsh\)	\Rsh
\(\downdownarrows\)	\downdownarrows
\(\upharpoonright\)	\upharpoonright
\(\downharpoonright\)	\downharpoonright
\(\rightsquigarrow\)	\rightsquigarrow

使用\\ 表示换行

3.16.戴帽符号

符号	Markdown
\(\hat{x}\)	\hat{x}
\(\tilde{x}\)	\tilde{x}
\(\check{x}\)	\check{x}
\(\grave{x}\)	\grave{x}
\(\bar{x}\)	\bar{x}
\(\widehat{xy}\)	\widehat{xy}
\(\widetilde{xyz}\)	\widetilde{xyz}
\(\breve{x}\)	\breve{x}
\(\acute{x}\)	\acute{x}
\(\dot{x}\)	\dot{x}

3.17.导数相关符号

符号	latex语法	形状
偏导符号	\partial x	\(\partial x\)
求导符号	\mathrm{d} x	\(\mathrm{d} x\)
撇形式的求导符号	x^{’}	\(x^{’}\)
点形式的求导符号	\dot x	\(\dot x\)
点形式的求导符号(几个点就是几个d)	\ddot x	\(\ddot x\)
全微分算子	\nabla f	$ \nabla f$

4.字体样式

样式	latex语法	形状
粗体	\bold	\(\bold B\)
斜体	\it	\(\it B\)
正体	\rm	\(\rm B\)
花体	\mathcal	\(\mathcal B\)
数集	\mathbb	\(\mathbb B\)
粗体花体	\pmb	\(\pmb B\)

5.补充

花括号

\[c(u)=\begin{cases} \sqrt\frac{1}{N}，u=0\\ \sqrt\frac{2}{N}， u\neq0\end{cases} \]

c(u)=\begin{cases} \sqrt\frac{1}{N}，u=0\\ \sqrt\frac{2}{N}， u\neq0\end{cases}  

空格

\[a \quad b \\ a\ b \]

a \quad b  #4个空格
a\ b  #小空格

矩阵

\[a = \left[ \matrix{ \alpha_1 & test1\\ \alpha_2 & test2\\ \alpha_3 & test3 } \right] \]

a = \left[
\matrix{
  \alpha_1 & test1\\
  \alpha_2 & test2\\
  \alpha_3 & test3 
}
\right]