Crowdsourcing a list of general resources on AI and mathematics

Given current events, I think it is worthwhile to start collecting useful online resources with regards to AI and mathematics in general. I will start a list below, but ask contributors to contribute further links in the comments. Note that while I personally do not agree with 100% of the content of every single link below, I find each of them interesting enough to be worth mentioning here. I am excluding my own writings on these topics, which can be found here (and summarized here) instead. Res...