导航
特殊符号¶
本节收录一些特殊符号。
字体转换¶
若要对公式的某一部分字符进行字体转换,可以用 {\字体 {需转换的部分字符}}
命令,其中 \字体
部分可以参照下表选择合适的字体。一般情况下,公式默认为意大利体.
输入 |
说明 |
显示实例 |
---|---|---|
|
罗马体 |
\({\rm D}\) |
|
花体 |
\(\cal D\) |
|
意大利体 |
\(\it D\) |
|
黑板粗体 |
\(\Bbb D\) |
|
粗体 |
\(\bf D\) |
|
数学斜体 |
\(\mit D\) |
|
等线体 |
\(\sf D\) |
|
手写体 |
\(\scr D\) |
|
打字机体 |
\(\tt D\) |
|
旧德式字体 |
\(\frak D\) |
|
黑体 |
\(\boldsymbol{X}\), \(\boldsymbol{x}\) |
希腊字母¶
输入 \小写希腊字母英文全称
和 \首字母大写希腊字母英文全称
来分别输入小写和大写希腊字母。对于大写希腊字母与现有字母相同的,直接输入大写字母即可。
输入 |
显示 |
输入 |
显示 |
---|---|---|---|
|
\(\alpha\) |
|
\(A\) |
|
\(\beta\) |
|
\(B\) |
|
\(\gamma\) |
|
\(\Gamma\) |
|
\(\delta\) |
|
\(\Delta\) |
|
\(\epsilon\) |
|
\(E\) |
|
\(\zeta\) |
|
\(Z\) |
|
\(\eta\) |
|
\(H\) |
|
\(\theta\) |
|
\(\Theta\) |
|
\(\iota\) |
|
\(I\) |
|
\(\kappa\) |
|
\(K\) |
|
\(\lambda\) |
|
\(\Lambda\) |
|
\(\nu\) |
|
\(N\) |
|
\(\mu\) |
|
\(M\) |
|
\(\xi\) |
|
\(\Xi\) |
|
\(o\) |
|
\(O\) |
|
\(\pi\) |
|
\(\Pi\) |
|
\(\rho\) |
|
\(P\) |
|
\(\sigma\) |
|
\(\Sigma\) |
|
\(\tau\) |
|
\(T\) |
|
\(\upsilon\) |
|
\(\Upsilon\) |
|
\(\phi\) |
|
\(\Phi\) |
|
\(\chi\) |
|
\(X\) |
|
\(\psi\) |
|
\(\Psi\) |
|
\(\omega\) |
|
\(\Omega\) |
运算符¶
关系运算符 |
markdown |
集合运算符 |
markdown |
---|---|---|---|
\(\pm\) |
|
\(\emptyset\) |
|
\(\times\) |
|
\(\in\) |
|
\(\div\) |
|
\(\notin\) |
|
\(\mid\) |
|
\(\subset\) |
|
\(\nmid\) |
|
\(\supset\) |
|
\(\cdot\) |
|
\(\subseteq\) |
|
\(\circ\) |
|
\(\supseteq\) |
|
\(\ast\) |
|
\(\bigcap\) |
|
\(\bigodot\) |
|
\(\bigcup\) |
|
\(\bigotimes\) |
|
\(\bigvee\) |
|
\(\bigoplus\) |
|
\(\bigvee\) |
|
\(\leq\) |
|
\(\bigwedge\) |
|
\(\geq\) |
|
\(\biguplus\) |
|
\(\neq\) |
|
\(\bigsqcup\) |
|
\(\approx\) |
|
||
\(\equiv\) |
|
\(\ll\) |
|
\(\sum\) |
|
||
\(\prod\) |
|
\(\sim\) |
|
\(\coprod\) |
|
\(\backsim\) |
|
\(\prec\) \(\preceq\) \(\succ\) \(\succeq\) |
|
对数运算符 |
markdown |
戴帽符号 |
markdown |
连线符号 |
markdown |
---|---|---|---|---|---|
\(\log\) |
|
\(\hat{y}\) |
|
\(\overline{a+b+c+d}\) |
|
\(\lg\) |
|
\(\check{y}\) |
|
\(\underline{a+b+c+d}\) |
|
\(\ln\) |
|
\(\breve{y}\) |
|
\(\overbrace{a+\underbrace{b+c}{1.0}+d}^{2.0}\) |
|
三角运算符 |
markdown |
微积分运算符 |
markdown |
逻辑运算符 |
markdown |
---|---|---|---|---|---|
\(\bot\) |
|
\(\prime\) |
|
\(\because\) |
|
\(\angle\) |
|
\(\int\) |
|
\(\therefore\) |
|
\(30^\circ\) |
|
\(\iint\) |
|
\(\forall\) |
|
\(\sin\) |
|
\(\iiint\) |
|
\(\exists\) |
|
\(\cos\) |
|
\(\iiiint\) |
|
\(\not=\) |
|
\(\tan\) |
|
\(\oint\) |
|
\(\not>\) |
|
\(\cot\) |
|
\(\lim\) |
|
\(\not\subset\) |
|
\(\sec\) |
|
\(\infty\) |
|
||
\(\csc\) |
|
\(\nabla\) |
|
箭头符号 |
markdown |
---|---|
\(\uparrow\) |
|
\(\downarrow\) |
|
\(\Uparrow\) |
|
\(\Downarrow\) |
|
\(\rightarrow\) |
|
\(\leftarrow\) |
|
\(\Rightarrow\) |
|
\(\Leftarrow\) |
|
\(\longrightarrow\) |
|
\(\longleftarrow\) |
|
\(\Longrightarrow\) |
|
\(\Longleftarrow\) |
|
\(f: {\mathbf x_t} \mapsto {\mathbf y_t}\) |
|
\(\Longleftrightarrow\) |
|
\(\boldsymbol{\hat y} = \boldsymbol{W} \boldsymbol{x}\) 的输入 代码:
$\boldsymbol{\hat y} = \boldsymbol{W} \boldsymbol{x}$
\(\ell_p\) 范数:
$\ell_p$
对于一些特殊的数学符号可以使用 \operatorname{}
或者 \text{}
来进行转换,如:$\text{cov}$
和 $\operatorname{s.t.}$
便显示为:\(\text{cov}\) 和 \(\operatorname{s.t.}\)
还有:
$A \xrightarrow{f} B \; a \; \bot b \; \overset{def}{=}$
\(A \xrightarrow{f} B \; a \; \bot b \; \overset{def}{=}\)
$$
\underset{x\in S\subseteq X}{\operatorname{arg\,max}}\, f(x) := \{x \mid x\in S \wedge \forall y \in S : f(y) \le f(x)\}.
$$
$$
\operatorname*{\arg\max}_{x\in S\subseteq X}\, f(x) := \{x \mid x\in S \wedge \forall y \in S : f(y) \le f(x)\}.
$$
更多特殊符号可以访问:Detexify
更多关于数学符号的内容,参 考 L ATEX Mathematical Symbols
关于数学符号的解释见 List of mathematical symbols by subject