Formal Methods in Mathematics /
Lean Together 2020

Formal Methods in Mathematics / Lean Together 2020 will run from Monday, January 6 to Friday, January 10, 2020 at Carnegie Mellon University, in Pittsburgh, Pennsylvania. The meeting is a successor to Lean Together 2019.

Carnegie Mellon University

The first three days will focus on formal methods in pure and applied mathematics, including interactive theorem proving, automated reasoning, verification of symbolic and numeric computation, and general mathematical infrastructure.

The last two days will be devoted to specifically to the Lean Theorem Prover and its core library, mathlib. Users and library developers will have opportunities to discuss work in progress and plans for the future.

Attendance is free and open to the public, but we ask you to let us know by December 6 if you plan to come. If you are tentatively planning to attend, please tell us now and update us if your plans change. You can use our registration page or contact the organizers, Jeremy Avigad ( and Robert Y. Lewis (

The meeting is supported by grant FA9550-18-1-0325 from the Air Force Office of Scientific Research. The contents do not necessarily reflect the views of the AFOSR.