Nice. Let's see if this MathML thing works as intended:

$a b$

Well, actually, it does. But only after I changed the extension of the file from html to xhtml. What a crazy thing is this? What is the purpose of that damned XML header on this file? Isn't it to tell the damn server that this is an XML file? I suppose that the server here may be broken.

Oh, and talking about broken things, my cable modem just got fried after today's thunderstorm. Wow. Nice to have a backup plan.