alt Hacker NewsRight, I’m thinking of the de Bruijin criterion applied to the generated kernel in this case. That generated kernel sounds large, and being generated, I’m curious as to why or how we don’t have to verify/understand it?
Right, I’m thinking of the de Bruijin criterion applied to the generated kernel in this case. That generated kernel sounds large, and being generated, I’m curious as to why or how we don’t have to verify/understand it?
You're confused because the word kernel is used in two different senses.
The "generated kernel" refers to a "geometric modeling kernel", which has absolutely nothing to do with the proof-checking kernel that the de Bruijn criterion talks about. The proof can be verified by Lean's ordinary proof-checker, or external checkers.