New Blath!
Well, as today’s main post sort of died, I really should post some good news. Jeff Morton has started a weblog! It’s a great coincidence, because just yesterday I was mentioning his use of spans in categorifying the quantum harmonic oscillator during my talk. I see good things coming from this.
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The Unapologetic Mathematician 
Hi, John. Thanks for noticing. I expect to have something worthwhile to post shortly, as I’m getting my thesis ready to put on the arXiv. When I do, I’ll probably write a few posts talking about what’s in it – including more stuff involving spans of groupoids and TQFT’s.
Which reminds me – I like how well your posts integrate math notation: can you point me at an explanation of how to make that work on wordpress?
There’s an explanation of it here. It’s basically just LaTeX, but with a different wrapper.