Oh well, it should be latex.
I used this post: supporting latex in octopress
To enable this, I used kramdown and mathjax, look at changing markdown to kramdown http
Here is a very simple example of latex:
$$ \xi = 15 \ \frac{d^2f}{dx^2} = 6xf - 88 $$
I love writing articles in latex and after writing some recently, I thought about reposting it here. Now I have my tools. Stay tuned.
