It’s out! And freaky difficult as well… Play it online, too, and don’t forget the other topology-related crossword puzzles. Enjoy!
It’s been a long time, and I haven’t given any news from the Summer Topology Conference. There I met Frédéric Mynard. Frédéric stressed the importance of filters to me, and I should mention a few of the nice things one can do with them. See the first part of the post.