The short version
A community repository for formalized mathematical proofs and results.
From the HackerLinks archive
Metamath
A community repository for formalized mathematical proofs and results.
At a glance:
First seen:2026-08-20
Last seen:2026-08-20
Times seen:1
Website:us.metamath.org
Why it caught our attention
A commenter highlighted Metamath as the established centralized equivalent to the new Lean registry.
Where it surfaced on Hacker News
2026-08-20
“Very cool. The metamath community tends to centralize results, so its equivalent is simply:”
dwheeler · comparison
Direct HN comment
Palomar: A registry of Lean verified mathematics