Lean 4 fork for HoTT-compatible kernel extensions (Path types, transport, HITs). Maintained against upstream leanprover/lean4.
3f3a26c53c
This PR refines MePo premise selection so that (1) candidates are restricted to theorems, matching the convention already used by `SineQuaNon` and `SymbolFrequency`, and (2) the result is ordered lexicographically by `(iteration, score)` rather than by score alone. Before the theorem filter, `mepoSelector` returned functions, recursors, and casts (e.g. `Int.add`, `Eq.ndrec`, `cast`, `proof_irrel`) alongside real premises. With it, those go away and the obvious lemmas — e.g. `Int.add_comm` for `a + b = b + a` — rank well above the remaining noise. The `(iteration, score)` ordering preserves the iteration priority of the original Meng–Paulson MePo: an iter-1 premise scoring 0.6 always ranks above an iter-2 premise scoring 1.0, since later iterations score against a strictly larger `relevant` set and a higher threshold, so their raw scores are not comparable. Thanks to Xavier Généreux for the report. Further tuning of the score function (the remaining problem: small generic theorems still score 1.0) is tracked in https://github.com/leanprover/lean4/issues/13749. Depends on https://github.com/leanprover/lean4/pull/13747. 🤖 Prepared with Claude Code Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com> |
||
|---|---|---|
| .claude | ||
| .github | ||
| .vscode | ||
| doc | ||
| images | ||
| releases_drafts | ||
| script | ||
| src | ||
| stage0 | ||
| tests | ||
| .gitattributes | ||
| .gitignore | ||
| .gitpod.Dockerfile | ||
| .gitpod.yml | ||
| .ignore | ||
| AGENTS.md | ||
| CMakeLists.txt | ||
| CMakePresets.json | ||
| CODEOWNERS | ||
| CONTRIBUTING.md | ||
| flake.lock | ||
| flake.nix | ||
| lean-toolchain | ||
| LICENSE | ||
| LICENSES | ||
| README.md | ||
| RELEASES.md | ||
This is the repository for Lean 4.
About
- Quickstart
- Homepage
- Theorem Proving Tutorial
- Functional Programming in Lean
- Documentation Overview
- Language Reference
- Release notes starting at v4.0.0-m3
- Examples
- External Contribution Guidelines
Installation
See Install Lean.
Contributing
Please read our Contribution Guidelines first.
Building from Source
See Building Lean.