Using MathJax in Tumblr
Did you know you can use MathJax to typeset math in Tumblr? Here is an example:
$$\cos x = \sum_{n = 0}^\infty \frac{(-1)^n}{(2n+1)!} x^{2n+1}$$
Inline formlas too, such as \(f: GL(2, \mathbb{R}) \rightarrow \mathbb{C}^*\).
This is apparently not without bugs. For example, matrices don’t seem to render properly on Tumblr because when you use the double-backslash symbol used in \(\LaTeX\) to signal the end of a row, one of those backslashes gets interpreted as a line break. For example, the \(4 \times 4\) matrix at this post (on a non-Tumblr blog) ends up looking like this:
$$\left( \begin{array}{cccc} 2&3&4&5 \ 0&-1&2&1 \ 0&0&2&4 \ 0&3&-6&0 \end{array} \right) $$
If you right click and view the source, you can see the double-backslashes have been redacted to single backslashes. Maybe I’m not doing it right, but I’ll look into it.
Still, this is pretty cool, and you can learn how to do this yourself at this three-minute video.
