Checked fact 180518 Oct 2026Research

The Validating a Lean Proof page says lean4checker reads the declarations and proofs as stored by lean in the .olean files and replays them through the kernel.

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The exact words it rests on

The lean4checker tool reads the declarations and proofs as they are stored by lean during building (the .olean files ), and replays them through the kernel. It trusts that the .olean files are structurally correct.

What the source said when we opened it, on 18 Oct 2026.

The source

Lean reference: Validating a Lean Proof
Lean FRO / Lean project

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Checked

Checked by the notis newsroom on 18 Oct 2026, against the source above.

In the story

How Lean checks an AI-written proof, and where that stops 18 Oct 2026

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“The Validating a Lean Proof page says lean4checker reads the declarations and proofs as stored by lean in the .olean files and replays them through the kernel.” ai notis, checked 18 Oct 2026. Source: Lean reference: Validating a Lean Proof (Lean FRO / Lean project). https://ainotis.com/c/1805

As a reference (APA style)

ai notis. (2026, October 18). The Validating a Lean Proof page says lean4checker reads the declarations and proofs as stored by lean in the .olean files and replays them through the kernel [Checked claim 1805]. ai notis. https://ainotis.com/c/1805

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