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[ARTICLE · art-98003] src=lesswrong.com ↗ pub= topic=artificial-intelligence verified=true sentiment=· neutral

I'm starting a interview series of people working in Lean / formal methods / math formalization

Tanner Duve, Member of Technical Staff at Logical Intelligence, discusses formal verification, compilers in Lean, and AI-assisted math formalization in the first episode of a new interview series. The conversation covers contributions to Mathlib and CSLib, Turing incompleteness in Lean, and the impact of AI on formal verification, with Duve sharing insights from his background as a former D1 football player.

read1 min views1 publishedAug 15, 2026

I think the topics of discussion would be of interest to a lot of people here, so I thought I'd share the first episode:

Tanner Duve 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 thoughts on the future of AI-assisted math formalization.

Chapters:

00:00 Intro05:12 Social aspect of formal verification07:34 Contributing to mathlib and CSLib15:57 AlgoLean 23:17 What is a Free Monad? 34:27 Turing (in)completeness in Lean 43:13 AI in math formalization 46:22 Where did you learn type theory? 49:49 Lean vs Rocq vs Haskell 51:50 Favorite concept in type theory 55:16 Rust's type theory 56:57 Pedagogy of PL theory 59:52 When did you decide to work in PL theory? 1:02:06 Formal verification pre-AI vs. now 1:05:19 Playing D1 football in college 1:08:16 Veganism 1:12:17 Advice

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