1, MarkDown basic grammar

Use: https://www.cnblogs.com/-guz/p/10258557.html

https://www.cnblogs.com/xichenHome/p/12124333.html

Typora support the export dozen text formats. (HTML, PDF, Word document ⋯⋯)

Insert the TOC plug

• 112

  • 345

• Ctrl + shift + 1 Outline view

• Directory: [toc], at the beginning of the article where input [toc]

### 1, the basic syntax:

Title: Level 1 == == #

== == Level 3 ###

(1), #### Level == 4

Method one: Check the contents, can be performed right

Method Two:

Title: # Number # 1 #

Reference, ctrl + shift + q,>

Python, `backtick

Paragraph, line

Highlight of standardization: ==

Options paragraphs

Ordered list, unordered list; indent:,

• • : Namely - + * to enter a space
• - [] should have a space between symbols,
• -

Indent: Copy below

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显示描述：xucheng博客

Block: `` `python

代码引用（>式）：> hello markdown!
插入链接：<https://www.cnblogs.com/XuChengNotes/>
		[xucheng博客](https://www.cnblogs.com/XuChengNotes/ "xucheng博客")
		
插入图片（链接）：![数据类型总结-搞笑结束.jpg?x-oss-process=style/watermark](http://www.chenyoude.com/Python从入门到放弃/数据类型总结-搞笑结束.jpg?x-oss-process=style/watermark '描述信息')
插入图片（图片路径）：
	•绝对路径：
    •相对路径:

$ rm -r ~/.PyCharm2016.3

print("hello python")
print("hello world")

Superscript / subscript: 22, H2o

	1、 x^{y^z}=(1+{\rm e}^x)^{-2xy^w} 

	2、 \sideset{^1_2}{^3_4}\bigotimes 

上标：2^2^
下标：H~2~o

当上下标的内容多于一个字符，需要用 {} 将这些内容括成一个整体。上下标可以嵌套，也可以同时使用。
1、$$ x^{y^z}=(1+{\rm e}^x)^{-2xy^w} $$

如果要在左右两边都有上下标，可以用 \sideset 命令。
2、$$ \sideset{^1_2}{^3_4}\bigotimes $$

Dividing line:---

---

Table: colon format representing a second row are aligned, centered respectively; right-justified; Left):

name | age | sex 
:-:|:-|-:


1、内嵌数学公式$\sum_{i=1}^{10}f(i)\,\,\text{thanks}$
2、$$\sum_{i=1}^{10}f(i)\,\,\text{thanks}$$

Mathematical formula:

• Line Embedded: 1, embedded mathematical formula \ sum _ ^ {10} f (i) ,, \ text
• Block: 2, \ sum _ ^ {10} f (i) ,, \ text

### four, how to insert the brackets and delimiters

(), [] And | represents the symbol itself, the {} are represented. When large to be displayed in parentheses or separator, use \ left and \ right commands.

1、$$ f(x,y,z) = 3y^2z \left( 3+\frac{7x+5}{1+y^2} \right) $$
2、有时候要用 \left. 或 \right. 进行匹配而不显示本身。
$$ \left. \frac{{\rm d}u}{{\rm d}x} \right| _{x=0} $$

1、 f(x,y,z) = 3y^{2z \left( 3+\frac{7x+5}{1+y}2} \right)

2、 \left. \frac{{\rm d}u}{{\rm d}x} \right| _

### Fifth, how to enter scores

Usually \ FRAC molecule {} {} command generation denominator of a fraction, the fraction can be nested. Convenient situation can be entered directly \ frac ab to quickly generate a abab.

If the fraction is complex, the molecule may also be used \ over denominator command, and the score only one layer.

如：\(\frac{a-1}{b-1} \quad and \quad {a+1\over b+1}\),显示： \frac \quad and \quad {a+1\over b+1}

### Sixth, how to enter prescribing

Use \ sqrt [root index, 2 is omitted] {square root input radicand} command.

Such as: \ (\ sqrt {2} \ Quad and \ Quad \ sqrt [n-] {}. 3 \) , displayed: \ sqrt {2} \ quad and \ quad \ sqrt [n] {3}

### Seven, how to enter the ellipsis

Mathematical formulas, there are two common ellipsis, \ ldots represents the bottom line of text aligned ellipses, \ cdots represents the center line of text aligned ellipses.

$$ f(x_1,x_2,\underbrace{\ldots}_{\rm ldots} ,x_n) = x_1^2 + x_2^2 + \underbrace{\cdots}_{\rm cdots} + x_n^2 $$

显示： f(x_1,x_2,\underbrace{\ldots}{\rm ldots} ,x_n) = x_1^{2 + x_2}2 + \underbrace{\cdots}{\rm cdots} + x_n^2

### Eight, how the input vector

Use \ vec {vector} to automatically generate a vector. You can also use \ overrightarrow commands such as custom symbols above the letters.

Such as: \ (\ VEC {A} \ CDOT \ VEC {B} = 0 \) , displayed: \ vec \ cdot \ vec = 0

$$ \overleftarrow{xy} \quad and \quad \overleftrightarrow{xy} \quad and \quad \overrightarrow{xy} $$

\overleftarrow \quad and \quad \overleftrightarrow \quad and \quad \overrightarrow

### Nine, how to enter points

Use \ ^ integral upper integration limit {} is the expression product of the input to an integrator int_.

Such as: \ (\ INT_0 ^. 1 {X ^ 2} \, {\ rm d} X \) , displayed: \ INT_0 ^{. 1 {X} 2}, {\ rm d} X examples, and {\ rm d} portions may be omitted, recommends the addition, the expression more beautiful.

### Ten, how to enter the operational limit

Use \ lim_ {variable \ to expression} expressions to enter a limit. If there is demand, you can change the \ to the symbol to any symbol.

$$ \lim_{n \to +\infty} \frac{1}{n(n+1)} \quad and \quad \lim_{x\leftarrow{示例}} \frac{1}{n(n+1)} $$

Display: \ lim_ {n \ to + \ infty} \ frac {1} {n (n + 1)} \ quad and \ quad \ lim_ {x \ leftarrow {Example}} \ frac {1} {n (n + 1)}

### XI, how to enter accumulation, tired into operation

Use \ sum_ subscript expression {} ^ {} {superscript expression accumulating an accumulation input expression}. Similarly, the use of \ prod \ bigcup \ bigcap respectively multiply input tired, union and intersection. When such a symbol within the display up and down the line will be moved to the upper right corner subscript expression and the bottom right corner.

Such as:

$$ \sum_{i=1}^n \frac{1}{i^2} \quad and \quad \prod_{i=1}^n \frac{1}{i^2} \quad and \quad \bigcup_{i=1}^{2} R $$

显示： \sum_^{n \frac{1}{i}2} \quad and \quad \prod_^{n \frac{1}{i}2} \quad and \quad \bigcup_^{2} R

### Twelve, how to enter the Greek alphabet

Enter \ lowercase Greek letter and the full name and \ uppercase first letter of the Greek alphabet English name to enter Greece respectively lower and upper case letters, Greek letters to uppercase letters with the same existing direct input uppercase letters can be.

Input Input Input Display Display Input Display Display
\ alpha $ \ alpha AAA β

Some letters have special variable form, beginning with \ var-

Lowercase, uppercase variables form display
\ epsilon E \ varepsilon $ \ epsilon \ mid E \ mid \ varepsilon