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markdown中Latex或Katex公式

上下标

名称 效果 tex
上标 \(10^5\) 10^{5}
下标 \(d_{2}\) d_{2}
上下标 \(d_{2}^{2}\) d_{2}^{2}
Tip

上下标两例中{}表示作用范围,对于单个字符可以不加,对于多个字符则是必须的。

特例
  1. 有一些markdown渲染器,如pandoc,无法渲染\degree,可以使用\circ作为上标表示角度的单位。
  2. 一撇:如\(K'\),可以像这样写:$K'$

希腊字母

  • 对于大写希腊字母,在前面加var(如\varxxx)一般表示斜体,部分大写希腊字母没有\varxxx的形式
希腊字母小写 tex公式语法 大写 tex
\(\alpha\) \alpha \(\Alpha\) \Alpha
\(\beta\) \beta \(\Beta\) \Beta
\(\gamma\) \gamma \(\Gamma\) \Gamma
\(\delta\) \delta \(\Delta\) \Delta
\(\epsilon\) \epsilon \(\Epsilon\) \Epsilon
\(\varepsilon\) \varepsilon
\(\digamma\) \digamma
\(\zeta\) \zeta \(\Zeta\) \Zeta
\(\eta\) \eta \(\Eta\) \Eta
\(\theta\) \theta \(\Theta\) \Theta
\(\iota\) \iota \(\Iota\) \Iota
\(\kappa\) \kappa \(\Kappa\) \Kappa
\(\lambda\) \lambda \(\Lambda\) \Lambda
\(\mu\) \mu \(\Mu\) \Mu
\(\nu\) \nu \(\Nu\) \Nu
\(\xi\) \xi \(\Xi\) \Xi
\(o\) o \(O\) O
\(\pi\) \pi \(\Pi\) \Pi
\(\varpi\) \varpi
\(\rho\) \rho \(\Rho\) \Rho
\(\sigma\) \sigma \(\Sigma\) \Sigma
\(\varsigma\) \varsigma
\(\tau\) \tau \(\Tau\) \Tau
\(\upsilon\) \upsilon \(\Upsilon\) \Upsilon
\(\varphi\) \varphi \(\Phi\) \Phi
\(\phi\) \phi
\(\chi\) \chi \(\Chi\) \Chi
\(\psi\) \psi \(\Psi\) \Psi
\(\omega\) \omega \(\Omega\) \Omega

字母向量、箭头、上下划线、上尖、上波浪线、一阶导数、二阶导数

名称 效果 tex
向量(上箭头) \(\vec{a}\) \vec{a}
左箭头 \(\overleftarrow{abc}\) \overleftarrow{abc}
右箭头 \(\overrightarrow{abc}\) \overrightarrow{abc}
平均值(上划线) \(\overline{abc}\) \overline{abc}
下划线 \(\underline{abc}\) \underline{abc}
(线性回归,直线方程) 尖 \(\widehat{abc}\) \widehat{abc}
颚化符号 等价无穷小 \(\widetilde{abc}\) \widetilde{abc}
一阶导数(上点) \(\dot{a}\) \dot{a}
二阶导数(上两点) \(\ddot{a}\) \ddot{a}
上花括号 \(\overbrace{abc}\) \overbrace{abc}
下花括号 \(\underbrace{abc}\) \underbrace{abc}

数学结构

名称 效果 tex
分式 \(\frac{a}{b}\) \(\frac{a}{b}\)
根式 \(\sqrt{abc}\) \sqrt{abc}
n次根 \(\sqrt[n]{abc}\) \sqrt[n]{abc}

数学运算符号

名称 效果 tex
\(+\) +
\(-\) -
\(\times\) \times
\(\div\) \div
点乘 \(\cdot\) \cdot
星乘 \(\ast\) \ast
等于 \(=\) =
不等于 \(\ne\) \neq或\ne
加减 \(\pm\) \pm
减加 \(\mp\) \mp
求和 \(\sum\) \sum
连乘 \(\prod\) \prod
余积 \(\coprod\) \coprod
(一重)积分 \(\int\) \int
一重闭曲线积分 \(\oint\) \oint
二重积分 \(\iint\) \iint
三重积分 \(\iiint\) \iiint
闭曲面积分 \(\oiint\) \oiint
体积积分 \(\oiiint\) \oiiint
\(\biguplus\) \biguplus
并集 \(\bigcup\) \bigcup
交集 \(\bigcap\) \bigcap
\(\bigodot\) \bigodot
\(\bigvee\) \bigvee
\(\bigwedge\) \bigwedge
\(\bigsqcup\) \bigsqcup

界定符

名称 效果 tex
竖线 \(\|\) |
\(\vert\) \vert
双竖线 \(\\\|\) \|
\(\Vert\) \Vert
花括号 \(\{\) \{
\(\}\) \}
尖括号 \(\lang\) \lang
\(\rang\) \rang
\(\lfloor\) \lfloor
\(\rfloor\) \rfloor
\(\lceil\) \lceil
\(\rceil\) \rceil
斜线 \(/\) /
反斜线 \(\backslash\) \backslash
中括号 \([\) [
\(]\) ]
向上箭头 \(\uparrow\) \uparrow
\(\Uparrow\) \Uparrow
向下箭头 \(\downarrow\) \downarrow
\(\Downarrow\) \Downarrow
\(\llcorner\) \llcorner
\(\lrcorner\) \lrcorner
\(\ulcorner\) \ulcorner
\(\urcorner\) \urcorner

函数名称

名称 效果 tex
arccos \(\arccos\) \arccos
arcsin \(\arcsin\) \arcsin
arctan \(\arctan\) \arctan
arg \(\arg\) \arg
cos \(\cos\) \cos
cosh \(\cosh\) \cosh
cot \(\cot\) \cot
coth \(\coth\) \coth
csc \(\csc\) \csc
deg \(\deg\) \deg
det \(\det\) \det
dim \(\dim\) \dim
exp \(\exp\) \exp
gcd \(\gcd\) \gcd
hom \(\hom\) \hom
inf \(\inf\) \inf
ker \(\ker\) \ker
lg \(\lg\) \lg
lim \(\lim\) \lim
liminf \(\liminf\) \liminf
limsup \(\limsup\) \limsup
ln \(\ln\) \ln
log \(\log\) \log
max \(\max\) \max
min \(\min\) \min
Pr \(\Pr\) \Pr
sec \(\sec\) \sec
sin \(\sin\) \sin
sinh \(\sinh\) \sinh
sup \(\sup\) \sup
tan \(\tan\) \tan
tanh \(\tanh\) \tanh