I use a Jekyll based blog and need a markdown parser that won't clobber my Mathjax expressions (for instance, interpreting b_t - b_{t-1} as b<em>t - b</em> t - 1). Mathjax and markdown get along nicely over on math.stackechange.com and mathoverflow.net. Some parsers also need to double escape the begin/end equation symbols \\(, while it seems others do not.
Things that aren't quite solutions:
Redcarpet2 has an option for no_intra_emphasis, which avoids underscores between letters being clobbered, so b_t is okay, but it still clobbers b_{t-1}.
There's a Jekyll plugin that lets you use liquid syntax, like {% m}% to begin an equation, but this means the file is no longer written in pure markdown and thus not portable to other contexts.
So is there a different markdown interpreter I can drop into Jekyll and experience bliss? If not, what workarounds have others found?
Markdown won't process anything in block-level HTML tag, so simply wrapping Mathjax syntax in <div> </div> protects the Mathjax syntax, regardless of the interpreter. This nicely avoids having to escape the commands that begin and end the Mathjax, such as \( (inline) and \[ (display). Thanks to @lsegal on Github for pointing this out to me.
来源：https://stackoverflow.com/questions/10438937/is-there-a-markdown-parser-supported-on-jekyll-that-plays-nicely-with-mathjax