I am looking for a PhD student to join us in Tallinn! #MathSky

My student's first solo paper! (And fourth overall in the space of a year🤩)

The 110th PSSL (Peripatetic Seminar on Sheaves and Logic) has started in Tallinn, the first ever to take place in Estonia! #MathSky

Just signed a contract with CUP for my higher-categorical diagrams book 😊

It may start with #landmines, but the bigger threat lies in the erosion of the laws of war. Hear from Jody Williams, on why the recent threat of withdrawals by some European nations from the Mine Ban Treaty endangers global norms and civilian lives. #ProtectMineBan

I don't think I've ever had a good shower in England. Every shower in the country seems to be broken or annoying in its own way. I don't know what it is. Every other country I've been to seems to have figured showers out.

I want to say this again, and clearly. I spoke to three KCs, and we were formally advised by two, at Premier League sets who said FWS's case was clearly wrong, and one said not even arguable. 1/2

Something I think is often misunderstood, is that the idea that men are inherently dangerous to women is not anti-patriarchy, but in fact foundational to patriarchy... the bargain of patriarchy is: to protect them from the multitude of strange men, women need the patronage of a "trusted" man...

You think the arbitrary arrest of political dissenters cannot happen in the UK? It already does. www.quaker.org.uk/news-and-eve...

If adversaries use inhumane weapons, that's all the more reasons to not use them---otherwise what's the difference? I know what landmines have done to my native country, I hope my adoptive country won't make this shameful choice @tsahkna.bsky.social

Higher Topos Theory is the Infinite Jest of mathematics

A few days ago, coming back to my hotel room in Manchester, I found a Lego piece on the floor. I kept it because you never know. Today, my kid got a Lego set for Christmas, bought by my partner several days later near Bristol. There was one piece missing in the box: the one I had found.

1. You think you’ve seen it all. You really have not. I’m a hard-bitten journalist of 39 years’ standing, but details of this story made me shout, weep and slap my head. This week’s column + 🧵 www.theguardian.com/commentisfre...

The programme and attendees of the First International Topological Conference in Moscow, 1935, are quite unbelievable arxiv.org/abs/1903.02065

Should have tagged #mathsky

Hello, attempting to relocate here. I'm a mathematician & an asst prof at TalTech, working on things adjacent to higher category theory, combinatorial topology, and rewriting theory. 👋