Lean is a dependently-typed programming language and theorem prover.

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  The Lean Kernel Arena is a public benchmarking site for Lean proof checkers. Anyone can build an independent Lean kernel. The Arena runs them all against the same suite: valid proofs each should accept, invalid proofs each should reject, plus timing and memory on Mathlib and the

  

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  @jevonduve

  : "The Lean developers have done a good job of making [Lean] very accessible and approachable" ❤️

  

  Tanner Duve (

  @jevonduve

  ) is a Member of Technical Staff at Logical Intelligence working on formal verification and compilers in Lean, an open-source contributor to Mathlib and CSLib, and a former D1 football player. I sat down with him for a conversation about his work and his

  

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  Great to see that these results include not only a Lean formalization, but one that passes validation in Comparator. 🔗github.com/anthropics/zet…

  

  We asked an unreleased research version of Claude to take a stab at the Riemann hypothesis. It didn’t solve it, but it did make strides on a related problem: it increased the lower bound for the fraction of zeros of the Riemann zeta function that satisfy the hypothesis from

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  Great to see "Lean-ification of the Ethereum spec", in service of formal verification, named as a priority here!

  

  I updated my 2023 roadmap diagram to overlay where the items that were there sit in the current Strawmap ( strawmap.org ). In general, a lot of overlap, but: * Some things got reshuffled in order (eg. quantum safety up-prioritized) * Some things deprioritized (eg.

  

  

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  𝐋𝐞𝐚𝐧 𝟒.𝟑𝟑.𝟎 𝐢𝐬 𝐥𝐢𝐯𝐞! This release brings 208 changes, including a more responsive editor, automatic 𝚝𝚛𝚢? suggestions, and 𝙵𝚕𝚘𝚊𝚝 no longer being an opaque type. Notable improvements include: ⚡ The elaborator no longer reruns a tactic when only trailing