Category Archives: news

Tackling the Minimal Superpermutation Problem

What’s the shortest string that contains every possible permutation of ABCD somewhere inside it? As it happens, it’s 33 letters long: ABCDABCADBCABDCABACDBACBDACBADCBA. A string like this is called a minimal superpermutation. So what’s the shortest string that contains every possible … Continue reading

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More on strictification

Another fascinating day! At lunch time Steve Lack told me some interesting things about the strictification operator for bicategories. Apparently section 5.6 of [GPS] is wrong, and Steve reckons Gray is probably not triequivalent to Bicat. (The mistake in 5.6 … Continue reading

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Calgary 2

I’m in Calgary now, at the CMS meeting. This morning’s session was very interesting, but so far I’ve learnt more from chatting with the other participants. The Sydneyites tell me that Ross Street thinks he has found a good way … Continue reading

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Calgary

Next week I’m off to Calgary, where I’m giving a talk at the category theory session of the Canadian Mathematical Society’s summer meeting, and then a (completely different) talk at FMCS. I’m not too worried about the FMCS talk, because … Continue reading

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Hello, world!

I thought it would be fun to start a “work” blog, where I can talk about things that I’m working on or would like to work on, or just think are cool and interesting. It remains to be seen whether … Continue reading

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