Metamath
No written verdict yet. Here is what commenters said.
Why people recommend it
“Stuff like this just wouldn't happen in Metamath.”
“My favorite minimalistic example of the Metamath base language”
Show 3 more
“https://us.metamath.org”
“I think it's worthy of study and understanding.”
“When I first heard about metamath I was blown away at how I could drill down to the base axioms”
Caveats and dissent
“Took me about 90 seconds to find a Metamath implementation bug”
Often compared with
From the makers not counted in the ranking
What semantics do you use for your HOL library? I scanned around but documentation on that page is a bit sparse. The github repo goes to a random user's page, and all I could find there was this unrelated repo: https://github.com/digama0/HOL
“Metamath contributor here! Each proving tool has its pros and cons, but always happy to see Metamath noted”
Threads where it came up
- Are We Stuck with Lean? 3 mentions
- Postmortem for Kernel Soundness Bug #14576 2 mentions
- Palomar: A registry of Lean verified mathematics 1 mention
- Why is it all in the kernel? 1 mention
- Human mathematicians are being outcounterexampled 1 mention
- "Why not just use Lean?" 1 mention
Data: metamath.json. Quotes are verbatim; the verdict and theme labels are written by a model from these comments, and every clause links to its sources.
All comments 11
“The metamath community tends to centralize results”
“Intriguingly, Metamath handles recursive definitions by factoring out the recursion into a single higher-order function”
“Took me about 90 seconds to find a Metamath implementation bug”
“Stuff like this just wouldn't happen in Metamath.”
“My favorite minimalistic example of the Metamath base language”
“https://us.metamath.org”
“I think it's worthy of study and understanding.”
“When I first heard about metamath I was blown away at how I could drill down to the base axioms”
“I've recently been dabbling a fair bit with Metamath”
“plenty of computer-verified mathematics done in Metamath/set.mm and Isabelle/ZF”
“Check out metamath.org”