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# Best way to do new math commands on forum?

There's one notion that I'd like to use in a blog article that's semi-nonstandard, namely I'd like to use a "defined equal-to" notation when I'm introducing a new short "name" for a quantity to distinguish it from the case of two "independent" sides being equal, just for clarity. At the moment in LaTeX I'm using \def\defeq{\mathrel{:=}} to get the commonly used := operator. Obviously that won't fly on the wiki or wordpress, but what's the best course: just replace the uses of defeq with a literal := and take how that gets formatted, or something else? (This is assuming there's not an alternative set of symbols to := for "defined as equal to" that'd be preferred?)

Comment Source::= will come out looking okay, and there's really nothing else to do on the wiki or the blog. In better TeX environments there's an [embarrassingly large number of ways](http://tex.stackexchange.com/a/28855) to make nicer-looking versions of this symbol, but none of them seem applicable here.