# latex常用符号

### 文章目录

• 0.常用公式
• 1.希腊字母
• 2.数学相关
• 3.分割符号
• 4.可变公式
• 5.数学函数
• 6.运算符号
• 7.其它符号
• 8.箭头合集
• 9.帽子标记
• 10.数学样式
• 11.大小颜色
• 13.多行公式
• 14.间距微调

ı \imath \imath ȷ \jmath \jmath ℓ \ell \ell

## 8.箭头合集

→ \rightarrow \rightarrow ⟶ \longrightarrow \longrightarrow ⇒ \Rightarrow \Rightarrow
⟹ \Longrightarrow \Longrightarrow ← \leftarrow \leftarrow ⟵ \longleftarrow \longleftarrow
⇐ \Leftarrow \Leftarrow ⟸ \Longleftarrow \Longleftarrow ↗ \nearrow \nearrow
↘ \searrow \searrow ↙ \swarrow \swarrow ↖ \nwarrow \nwarrow
↦ \mapsto \mapsto ⟼ \longmapsto \longmapsto ⇝ \rightsquigarrow \rightsquigarrow
⇉ \rightrightarrows \rightrightarrows ↔ \leftrightarrow \leftrightarrow ⟷ \longleftrightarrow \longleftrightarrow
⇔ \Leftrightarrow \Leftrightarrow ⟺ \Longleftrightarrow \Longleftrightarrow ⇌ \rightleftharpoons \rightleftharpoons
⇆ \leftrightarrows \leftrightarrows ⇋ \leftrightharpoons \leftrightharpoons ⇄ \rightleftarrows \rightleftarrows
↺ \circlearrowleft \circlearrowleft ↻ \circlearrowright \circlearrowright ⇍ \nLeftarrow \nLeftarrow
⇏ \nRightarrow \nRightarrow ⇎ \nLeftrightarrow \nLeftrightarrow ↭ \leftrightsquigarrow \leftrightsquigarrow
⇢ \dashrightarrow \dashrightarrow ⇠ \dashleftarrow \dashleftarrow

## 9.帽子标记

a ˉ \bar{a} \bar{a} a ˊ \acute{a} \acute{a} a ˇ \check{a} \check{a} a ˋ \grave{a} \grave{a}
a ˙ \dot{a} \dot{a} a ^ \hat{a} \hat{a} a ˘ \breve{a} \breve{a} a ⃗ \vec{a} \vec{a}
a ¨ \ddot{a} \ddot{a} a ~ \tilde{a} \tilde{a}

## 10.数学样式

\mathcal{A}
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z \mathcal{ABCDEFGHIJKLMNOPQRSTUVWXYZ}

\mathbb{A}
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z \mathbb{ABCDEFGHIJKLMNOPQRSTUVWXYZ}

\mathfrak{A}
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z \mathfrak{ABCDEFGHIJKLMNOPQRSTUVWXYZ}

\mathsf{A}
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z \mathsf{ABCDEFGHIJKLMNOPQRSTUVWXYZ}

\mathscr{A}
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z \mathscr{ABCDEFGHIJKLMNOPQRSTUVWXYZ}

\mathrm{A}
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z \mathrm{ABCDEFGHIJKLMNOPQRSTUVWXYZ}

\mathit{A}
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z \mathit{ABCDEFGHIJKLMNOPQRSTUVWXYZ}

\mathnormal{A}
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z \mathnormal{ABCDEFGHIJKLMNOPQRSTUVWXYZ}

\mathbf{A}
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z \mathbf{ABCDEFGHIJKLMNOPQRSTUVWXYZ}

\textbf{A} 文本样式粗体
ABCDEFGHIJKLMNOPQRSTUVWXYZ \textbf{ABCDEFGHIJKLMNOPQRSTUVWXYZ}

\text{A} 文本样式
ABCDEFGHIJKLMNOPQRSTUVWXYZ \text{ABCDEFGHIJKLMNOPQRSTUVWXYZ}

\bm{A}
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z \bm{ABCDEFGHIJKLMNOPQRSTUVWXYZ}

\boldsymbol{A}
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z \boldsymbol{ABCDEFGHIJKLMNOPQRSTUVWXYZ}

## 11.大小颜色

123 456 789 {\color{red}123} {\color{blue}456} {\color{green}789} {\color{red}123} {\color{blue}456} {\color{green}789}
a b c \tiny{abc} \tiny{abc}
a b c \scriptsize{abc} \scriptsize{abc}
a b c \footnotesize{abc} \footnotesize{abc}
a b c \small{abc} \small{abc}
a b c \normalsize{abc} \normalsize{abc}
a b c \large{abc} \large{abc}
a b c \Large{abc} \Large{abc}
a b c \LARGE{abc} \LARGE{abc}
a b c \huge{abc} \huge{abc}
a b c \Huge{abc} \Huge{abc}
[ ( ( [ ( \left[ \Bigg( \bigg( \Big[ \big( \right. \left[ \Bigg( \bigg( \Big[ \big( \right.
[ { } } ] \left[ \bigg\{ \Big\}\big\} \right] \left[ \bigg\{ \Big\}\big\} \right]

## 13.多行公式

{ x + y = 1 x − y = 1 , ∫ − ∞ + ∞ f ( x ) d x ∑ k = 0 n k \begin{cases} x+y=1\\ x-y=1 \end{cases}, \qquad % %后面是接注释，\qquaa表示空格 \begin{aligned} &\int_{-\infty}^{+\infty}f(x)\mathrm{d}x\\[.8em] &\sum_{k=0}^n k \end{aligned}

\begin{cases}
x+y=1\\
x-y=1
\end{cases},
\begin{aligned}
&\int_{-\infty}^{+\infty}f(x)\mathrm{d}x\\[.5em]
&\sum_{k=0}^n k
\end{aligned}
% &字符号表示对齐，\\另起一行, \\[.5em]里面的.5表示行高


( 1 2 3 4 5 6 7 8 9 ) , ∣ a b c d ∣ , a b c d e f \left(\begin{matrix} 1&2&3\\ 4&5&6\\ 7&8&9 \end{matrix}\right) ,\qquad \left| \begin{matrix} a&b\\ c&d \end{matrix}\right| ,\qquad \begin{matrix} a&b\\ c&d \\ e&f \end{matrix}

\left(\begin{matrix}
1&2&3\\
4&5&6\\
7&8&9
\end{matrix}\right)
\left|
\begin{matrix}
a&b\\
c&d
\end{matrix}\right|
\begin{matrix}
a&b\\
c&d \\
e&f
\end{matrix}


## 14.间距微调

x + y x+y x+y
x  ⁣ + y x\!+y x\!+y
x  ⁣ ⁣ + y x\!\!+y x\!\!+y

x + y x+y x+y
x +   y x+\,y x+\,y
x +    y x+\;y x+\;y
x + y x+\quad y x+\quad y
x + y x+\qquad y x+\qquad y