Palomar Launches Registry of Lean-Verified Mathematics

Terry Tao announced on his personal WordPress blog on August 18 2026 that a new registry, named Palomar, has been created to catalogue mathematics that has been formally verified in the Lean theorem prover. The post explains that Palomar will serve as a searchable index of Lean‑verified theorems, definitions, and proofs, providing researchers with a reliable source for citing formally proven results and facilitating the reuse of verified mathematical content.

Key features highlighted in the announcement include a standardized metadata schema for each entry, integration with existing Lean libraries, and a web interface that allows users to browse and search proofs by topic, author, or formal proof length. Tao noted that the registry is intended to promote transparency and reproducibility in mathematical research by making the underlying formal proofs publicly accessible. The post was shared on Hacker News, where it received six upvotes and no comments to date.

By centralizing Lean‑verified mathematics, Palomar aims to streamline collaboration among mathematicians and computer scientists working with formal methods. The initiative is expected to support the growing ecosystem of formalized mathematics, potentially accelerating the verification of complex proofs and encouraging broader adoption of theorem‑proving tools in research.