markdown examples part 1

Basic markdown examples are shown below

This text is bold
This text is also bold

This text is italic
This text is also italic

This text is italic and bold

An h2 heading

An h3 heading...

An h6 heading

A list with numbers:
1. One
2. Two
3. Three

A list with bullets:
Bullet
Bullet
* Bullet

Here's a blockquote:

Simple is better than complex

Here's a table:

Column1 Column 2 Column 3
Value 1 Value 2 Value 3
Value 4 Value 5 Value 6
Value 7 Value 8 Value 9

Colons can be used to align columns.

Tables Are Cool
col 3 is right-aligned $1600
col 2 is centered $12
zebra stripes are neat $1

There must be at least 3 dashes separating each header cell.
The outer pipes (|) are optional, and you don't need to make the
raw Markdown line up prettily. You can also use inline Markdown.

Markdown Less Pretty
Still renders nicely
1 2 3
var s = "JavaScript syntax highlighting";
alert(s);

:::python3
s = "Python syntax highlighting"
print s

:::html
No language indicated, so no syntax highlighting. 
But let's throw in a <b>tag</b>.

:::
# 输入宽度: 30
------------------------------
                       
······························
                      6.50
                      3.50
                      10.00
                      18.60
                      12.00
------------------------------

多行公式:

displaystyle
left( sum_{k=1}^n a_k b_k right)^2
leq
left( sum_{k=1}^n a_k^2 right)
left( sum_{k=1}^n b_k^2 right)


:::katex
displaystyle 
    frac{1}{
        Bigl(sqrt{phi sqrt{5}}-phiBigr) e^{
        frac25 pi}} = 1+frac{e^{-2pi}} {1+frac{e^{-4pi}} {
        1+frac{e^{-6pi}}
        {1+frac{e^{-8pi}}
         {1+cdots} }
        } 
    }


:::latex
f(x) = int_{-infty}^infty
    hat f(xi),e^{2 pi i xi x}
    ,dxi