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David Spivak has written a 3-part article for the Azimuth blog, and you can see all 3 parts here:
It explains how he got interested in the things he'll be discussing at our meeting in Turin on 25-28 May 2015.
I've set the three parts to be published on Friday 27 March, Monday 30 March and Thursday 2 April 2015. Since he doesn't read the Azimuth Forum I'm not asking for suggestions on how to improve the articles... though I'd be happy to hear about typos.