› added 9 years ago

344

TIL of the Stacks Project. It is an open-source textbook with ~4700 pages, made by many mathematicians with the intention of collecting all the prerequisite knowledge required to understand an extremely abstract mathematical object known as ‘algebraic stack’.

Read more stacks.math.columbia.edu

via reddit.com

O6rY TIL Nirvana originally started out as a Creedence Clearwater Revival cover band
rN9Re TIL that sticking out one’s tongue is a sign of respect or agreement and was often used as a greeting in traditional Tibetan culture. Apparently, a cruel ninth-century Tibetan king had a black tongue, so people stick out their tongues to show that they are not like him (and aren’t his reincarnation)
neK99 TIL De Armas’ breakout role as Paloma in No Time To Die was written specifically for her by director Cary Joji Fukunaga, who had been a fan of hers for years.
kOn1B TIL Welsh actor Johnathan Pryce played an Argentinian-born head of state twice. As Juan Peron in 'Evita' and Pope Francis in 'The Two Popes'.
P1AeZ TIL that zombie worms bore into the bones of whale carcasses with their specialised root tissues