在线编辑数学公式_数学公式生成在线-优快云博客

本文链接：https://blog.youkuaiyun.com/chengy35/article/details/12648347

本文介绍了一个强大的在线公式编辑工具，适用于数据库作业中使用特殊符号和数学表达式。详细解释了如何输入希腊字母、二元操作符、关系符号等，并提供了数据库作业中常见符号的英文代码。同时，分享了如何正确表示空格、连字符和数据库术语如nature_join。此外，还介绍了各种数学、逻辑和关系符号的英文代码，以及如何在公式中插入变量、大小写符号、箭头、括号、分隔符等。对于希望提高公式写作效率和准确性的人来说，这是一篇实用指南。

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今天在做数据库作业，发现要写公式，在网上找到了一个在线编辑的，就看了下。感觉功能真的是很强。

网址：

http://codecogs.izyba.com/products/eqneditor/editor.php

之后，发现了空格要用转义字符\ 连字符要用\_来表示，同时数据库的作业里面有个nature_join,这个符号用\Join来表示，下面是数学符号的英文代码。

Greek Letters

$t1.gif$
t1.gif

 \alpha               \theta               o                  \tau          
 \beta                \vartheta           \pi                 \upsilon      
 \gamma               \gamma              \varpi              \phi          
 \delta               \kappa              \rho                \varphi       
 \epsilon             \lambda             \varrho             \chi          
 \varepsilon          \mu                 \sigma              \psi          
 \zeta                \nu                 \varsigma           \omega        
 \eta                 \xi                                           
                                                                 
 \Gamma               \Lambda             \Sigma              \Psi          
 \Delta               \Xi                 \Upsilon            \Omega        
 \Theta               \Pi                 \Phi

Binary Operation Symbols

$t2.gif$
t2.gif

 \pm                  \cap                \diamond                    \oplus      
 \mp                  \cup                \bigtriangleup              \ominus     
 \times               \uplus              \bigtriangledown            \otimes     
 \div                 \sqcap              \triangleleft               \oslash     
 \ast                 \sqcup              \triangleright              \odot       
 \star                \vee                \lhd$^b$                    \bigcirc    
 \circ                \wedge              \rhd$^b$                    \dagger     
 \bullet              \setminus           \unlhd$^b$                  \ddagger    
 \cdot                \wr                 \unrhd$^b$                  \amalg      
 +                    -

$^b$ Not predefined in a format based on {\tt basefont.tex}.
     Use one of the style options 
     {\tt oldlfont}, {\tt newlfont}, {\tt amsfonts} or {\tt amssymb}.

Relation Symbols

$t3.gif$
t3.gif

 \leq                 \geq                \equiv              \models       
 \prec                \succ               \sim                \perp         
 \preceq              \succeq             \simeq              \mid          
 \ll                  \gg                 \asymp              \parallel     
 \subset              \supset             \approx             \bowtie       
 \subseteq            \supseteq           \cong               \Join$^b$     
 \sqsubset$^b$        \sqsupset$^b$       \neq                \smile        
 \sqsubseteq          \sqsupseteq         \doteq              \frown        
 \in                  \ni                 \propto             =             
 \vdash               \dashv              <                   >             
 :

$^b$ Not predefined in a format based on {\tt basefont.tex}.
     Use one of the style options 
     {\tt oldlfont}, {\tt newlfont}, {\tt amsfonts} or {\tt amssymb}.

Punctuation Symbols

$t4.gif$
t4.gif

 ,            ;           \colon              \ldotp              \cdotp

Arrow Symbols

$t5.gif$
t5.gif

 \leftarrow                   \longleftarrow              \uparrow      
 \Leftarrow                   \Longleftarrow              \Uparrow      
 \rightarrow                  \longrightarrow             \downarrow    
 \Rightarrow                  \Longrightarrow             \Downarrow    
 \leftrightarrow              \longleftrightarrow         \updownarrow  
 \Leftrightarrow              \Longleftrightarrow         \Updownarrow  
 \mapsto                      \longmapsto                 \nearrow      
 \hookleftarrow               \hookrightarrow             \searrow      
 \leftharpoonup               \rightharpoonup             \swarrow      
 \leftharpoondown             \rightharpoondown           \nwarrow      
 \rightleftharpoons           \leadsto$^b$

$^b$ Not predefined in a format based on {\tt basefont.tex}.
     Use one of the style options 
     {\tt oldlfont}, {\tt newlfont}, {\tt amsfonts} or {\tt amssymb}.

Miscellaneous Symbols

$t6.gif$
t6.gif

 \ldots               \cdots              \vdots              \ddots        
 \aleph               \prime              \forall             \infty        
 \hbar                \emptyset           \exists             \Box$^b$      
 \imath               \nabla              \neg                \Diamond$^b$  
 \jmath               \surd               \flat               \triangle     
 \ell                 \top                \natural            \clubsuit     
 \wp                  \bot                \sharp              \diamondsuit  
 \Re                  \|                  \backslash          \heartsuit    
 \Im                  \angle              \partial            \spadesuit    
 \mho$^b$             .                   |

$^b$ Not predefined in a format based on {\tt basefont.tex}.
     Use one of the style options 
     {\tt oldlfont}, {\tt newlfont}, {\tt amsfonts} or {\tt amssymb}.

Variable-sized Symbols

$t7.gif$
t7.gif

 \sum                 \bigcap             \bigodot      
 \prod                \bigcup             \bigotimes    
 \coprod              \bigsqcup           \bigoplus     
 \int                 \bigvee             \biguplus     
 \oint                \bigwedge

Log-like Symbols

$t8.gif$
t8.gif

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

Delimiters

$t9.gif$
t9.gif

 (                    )                   \uparrow            \Uparrow      
 [                    ]                   \downarrow          \Downarrow    
 \{                   \}                  \updownarrow        \Updownarrow  
 \lfloor              \rfloor             \lceil              \rceil        
 \langle              \rangle             /                   \backslash    
 |                    \|

Large Delimiters

$t10.gif$
t10.gif

  \rmoustache        \lmoustache         \rgroup            \lgroup 
  \arrowvert         \Arrowvert          \bracevert

Math mode accents

$t11.gif$
t11.gif

 \hat{a}            \acute{a}         \bar{a}           \dot{a}           \breve{a} 
 \check{a}          \grave{a}         \vec{a}           \ddot{a}          \tilde{a}

Some other constructions

$t12.gif$
t12.gif

 \widetilde{abc}                     \widehat{abc}
 \overleftarrow{abc}                 \overrightarrow{abc}
 \overline{abc}                      \underline{abc}
 \overbrace{abc}                     \underbrace{abc}
 \sqrt{abc}                          \sqrt[n]{abc}
 $f'$                                \frac{abc}{xyz}