3 ms·

Yeah, that github URL should be fixed. The HOL database is here https://github.com/metamath/set.mm/blob/develop/hol.mm https://github.com/metamath/set.mm/blob/d

• TheGoddessInari 3mo ago
  Reading `hol.mm` made me grateful for Lean 4's general purpose programming. I get the string substitution focus, and respect what metamath has achieved, but the bridge Lean 4 makes wrt systems programming has left quite an impression. I wonder how many people mostly see mathlib4 & think that's the one prescribed route (ala Rust) when one of Lean 4's under-documented super powers is the ease with which you can roll your own light-weight low to zero overhead domain-specialized constructs that are also trivial to prove because of the dependent type system. (Perhaps more for verified functional systems than deep math.)