QC (in Berlin 7/29-???)@QiaochuYuanReplying to @visakanv and @DaltonDEmeryone of the most famous results in differential geometry is called the “theorema egregium” and i always have to do a little double-take and remember that “egregium” is positive lolen.m.wikipedia.orgTheorema Egregium - Wikipedia4:33 AM · Mar 30, 2021·Twitter for iPad5 Likes