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#1: Initial revision
Math currently doesn't have a category where Articles would be particularly appropriate - they're not Q&A, and you generally aren't writing articles here in the Meta category. If you're interested in writing articles about mathematics, I'd recommend something along the lines of what Electrical Engineering does. EE has a "Papers" category where people can publish articles that they've written, that are generally expected to be at a fairly high level, from what I understand (I'm not particularly involved in EE, I'm afraid, as it's somewhat outside my wheelhouse). Feel free to start a discussion about such a category here and what the community would like to see of it.