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Formal verification community
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The Lean programming language and proof assistant now ships with verified kernels, meaning the code that checks proofs is itself formally verified. Announced by Leonardo de Moura, Lean's creator, the change strengthens the trustworthiness of every proof the system certifies. The developer community is discussing what this milestone means for formal verification and dependability of proof assistants.
- 2Terry Tao explains what mathematicians should know about Lean●What mathematicians should know about the Lean Theorem Prover: reliability & AI
Terence Tao has published a new post on his blog explaining the Lean Theorem Prover to mathematicians, focusing on questions of reliability and the role of artificial intelligence in formal proof verification. The piece arrives as Lean gains traction in research mathematics, with growing debate over how much trust formal systems and AI-assisted proofs deserve. Readers are weighing its practical guidance for mathematicians considering formalization tools.
- 3Lean Now Ships with Verified Kernels▼Lean Now Ships with Verified Kernels https:// leodemoura.github.io/blog/2026 -10-15-lean-now-ships-with-verified-kernels
Leo de Moura, the creator of the Lean programming language and theorem prover, has announced that Lean now ships with verified kernels. The news is being discussed by developers on Hacker News, where it drew attention from the programming languages and formal verification community. A verified kernel means the core component that checks proofs is itself formally verified, a significant milestone for trust in the proof assistant's foundations.