[IPython-User] Specification for mathematics in markdown for IPython notebook?

[reckoner]

> ----------------------------------------------------------------------
> From: MinRK<benjaminrk@gmail.com>
> Subject: Re: [IPython-User] Specification for mathematics in markdown
> 	for IPython notebook?
> To: "Discussions about using IPython. http://ipython.org"
> 	<ipython-user@scipy.org>
> Message-ID:
> 	<CAHNn8BWGGrKM2RvreJ4rrHoRg_eSLB=z9oT+9J4ZXHe0Cnt5uA@mail.gmail.com>
> Content-Type: text/plain; charset="utf-8"
>
> The math is rendered by MathJax, so their
> docs<http://www.mathjax.org/resources/docsindex/>  are
> the place to go.
>
> -MinRK

Thanks. But, how do you center in-line mathematics in the notebook? I'm 
doing $$ on either side of the line, but the math is left justified.

Thanks!