alexunder - 1 year ago 136

Markdown Question

After my investigating, I found mathjax can do this. But when write some example in my markdown file, it can't show the correct equations:

I have added this in the head of markdown file:

`<script type="text/javascript" src="http://cdn.mathjax.org/mathjax/latest/MathJax.js?config=default"></script>`

And type the mathjax statement:

(E=mc^2)，$$x_{1,2} = \frac{-b \pm \sqrt{b^2-4ac}}{2b}.$$

But github show nothing for the math symbols! please help me, thanks!

Tell me how to show math symbols in general github markdown.

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Answer Source

But github show nothing for the math symbols! please help me, thanks!

GitHub markdown parsing is performed by the **SunDown** (ex libUpSkirt) library.

The motto of the library is *"Standards compliant, fast,* **secure** *markdown processing library in C"*. The important word being "secure" there, considering your question :).

Indeed, allowing javascript to be executed would be a bit off of the MarkDown standard text-to-HTML contract.

Moreover, everything that looks like a HTML tag is either escaped or stripped out.

Tell me how to show math symbols in general github markdown.

Your best bet would be to find a website similar to **yuml.me** which can generate on-the-fly images from by parsing the provided URL querystring.

I've found some sites providing users with such service: **codedogs.com** (*no longer seems to support embedding*) or **iTex2Img**.
You may want to try them out. Of course, others may exist and some Google-fu will help you find them.

given the following markdown syntax

```
![equation](http://www.sciweavers.org/tex2img.php?eq=1%2Bsin%28mc%5E2%29&bc=White&fc=Black&im=jpg&fs=12&ff=arev&edit=)
```

it will display the following image

**Note**: In order for the image to be properly displayed, you'll have to ensure the querystring part of the url is **percent encoded**. You can easily find online tools to help you with that task, such as **www.url-encode-decode.com**

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