[chandureddyvari]

For anyone curious about what LEAN is, like me, here’s the explanation: Lean Theorem Prover is a Microsoft project. You can find it here: https://www.microsoft.com/en-us/research/project/lean/

[ashandoak]

Lean has been under development over the last 13 years, part of that while chief architect Leo de Moura was employed by Microsoft Research (he's now at AWS). However, Lean is an open source project, not exclusively a Microsoft project. More accurately, see here: https://lean-lang.org/