Formal Verification
mathlib4 reaches 5 million lines of code
The Lean 4 mathematical library mathlib4 surpasses 5 million lines of formalized mathematics, marking a major milestone in formalized mathematics.
Milestone
mathlib4 has surpassed 5 million lines of formalized mathematics, making it one of the largest formal mathematics libraries in existence.
Statistics
- 5M+ lines: Of Lean 4 code
- 10K+ theorems: Formalized
- 500+ contributors: From around the world
- 200+ commits: Per week at peak
Coverage
- Linear algebra
- Number theory
- Analysis
- Topology
- Algebraic geometry
- Category theory
- And more
Impact
mathlib4 enables:
- Undergraduate mathematics in Lean
- Research-level formalization
- AI training for theorem proving
- Educational projects
Community
The mathlib4 community continues to grow rapidly with contributions from mathematicians, computer scientists, and hobbyists.