Post #950 3.58K Dec 16, 2022, 11:40 UTC https://busy-beavers.tigyog.app/proofs-about-programs — интерактивное обучение LEAN. Интересно и очень доступно написано. TigYog Proofs about programs The halting problem be damned — we can prove all kinds of things about programs, and we can even check those proofs with computers! In this chapter, we’ll use a language called Lean to prove whether the famous Ackermann function always halts. Along the way…