公式流程图时序图.md 测试

目前支持较好的就只有这款软件：
https://www.typora.io/

可以创建行内公式，例如：$\Gamma(n) = (n-1)!\quad\forall n\in\mathbb N$
或者块级公式，
$$ x = \dfrac{-b \pm \sqrt{b^2 - 4ac}}{2a} $$

flow

st=>start: Start
e=>end: End
op1=>operation: My Operation
sub1=>subroutine: My Subroutine
cond=>condition: Yes or No?
io=>inputoutput: catch something...
st->op1->cond
cond(yes)->io->e
cond(no)->sub1(right)->op1

sequence

Alice->Bob: Hello Bob, how are you?
Note right of Bob: Bob thinks
Bob-->Alice: I am good thanks!

mermaid

graph TD
    A[Hard edge] -->|Link text| B(Round edge)
    B --> C{Decision}
    C -->|One| D[Result one]
    C -->|Two| E[Result two]
    C--> F((a))