A week or so ago, I happened across the London Number Theory Blog. I thought to myself “Huh, that’s an interesting idea; a blog specifically for workers on a particular subject in a particular city. Seems a little funny, but it could have some interesting uses.” Indeed, while there are some points of general interest on there, it does seem largely aimed at people who are participating their study group (which is great! more study groups should have blogs like this).
Then, just today, I found the Edinburgh Mathematical Physics Group blog. And then I started to wonder…one such blog seems like a curiosity, but two starts to feel like a trend. Was this driven by some kind of external event for just a weird coincidence?