Lean (proof assistant)
Lean is a proof assistant and programming language. It is based on the calculus of constructions with inductive types. It is an open-source project hosted on GitHub. It was principally developed by Leonardo de Moura while employed by Microsoft Research and now Amazon Web Services, and has had significant contributions from other coauthors and collaborators during its history.
| Paradigm | Functional programming, Imperative programming |
|---|---|
| Developer | Lean Focused Research Organization (FRO) |
| First appeared | 2013 |
| Stable release | 4.3.0
/ 30 November 2023 |
| Preview release | v4.4.0-rc1
/ 30 November 2023 |
| Typing discipline | Static, strong, inferred |
| Implementation language | Lean , C++ |
| OS | Cross-platform |
| License | Apache License 2.0 |
| Website | lean-lang |
| Influenced by | |
| ML Coq Haskell | |
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