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Lean 4 fork for HoTT-compatible kernel extensions (Path types, transport, HITs). Maintained against upstream leanprover/lean4.
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Paul Reichert 4a9a3eaf6b
feat: Rxx.nodup_toList lemmas and slice/foldl lemmas (#12438) 
This PR provides (1) lemmas showing that lists obtained from ranges have
no duplicates and (2) lemmas about `forIn` and `foldl` on slices.
2026-02-16 13:55:11 +00:00
.claude doc: add test suite documentation to .claude/CLAUDE.md (#12421) 2026-02-10 21:42:06 +00:00
.github fix: nightly revision date logic and mathlib trigger auth (#12463) 2026-02-13 06:03:15 +00:00
doc doc: add IJCAR 2026 grind paper examples (#12462) 2026-02-13 04:02:11 +00:00
images
releases_drafts chore: add release draft for the module system (#11359) 2025-11-26 15:01:07 +00:00
script feat: support revised nightly releases (nightly-YYYY-MM-DD-revK) (#12461) 2026-02-13 00:41:04 +00:00
src feat: Rxx.nodup_toList lemmas and slice/foldl lemmas (#12438) 2026-02-16 13:55:11 +00:00
stage0 chore: update stage0 2026-02-15 03:57:22 +00:00
tests fix: bring lengthTR lemma back into scope at toArray (#12502) 2026-02-16 13:33:10 +00:00
.gitattributes doc: grove: update and add String data (#11551) 2025-12-08 16:49:37 +00:00
.gitignore chore: add .vscode/settings.json to .gitignore (#10795) 2025-10-16 07:08:41 +00:00
.gitpod.Dockerfile chore: add gitpod configuration (#6382) 2024-12-15 21:38:13 +00:00
.gitpod.yml chore: add gitpod configuration (#6382) 2024-12-15 21:38:13 +00:00
.ignore
CMakeLists.txt chore: reformat all cmake files (#12218) 2026-01-28 18:23:08 +00:00
CMakePresets.json chore: CI: enable leak sanitizer again (#11339) 2025-11-27 18:32:35 +00:00
CODEOWNERS chore: make @hargoniX code owner of the compiler (#10732) 2025-10-10 04:43:38 +00:00
CONTRIBUTING.md doc: triage 2024-07-26 18:24:06 +02:00
flake.lock chore: update to c++20 (#12117) 2026-02-11 01:17:40 +00:00
flake.nix chore: update to c++20 (#12117) 2026-02-11 01:17:40 +00:00
lean-toolchain
lean.code-workspace chore: lean.code-workspace: fix terminal cwd (#10802) 2025-10-16 20:19:12 +00:00
LICENSE
LICENSES feat: ship cadical (#4325) 2024-08-23 09:13:27 +00:00
README.md doc: update URLs that are currently pointing to redirects (#10397) 2025-09-17 15:50:07 +00:00
RELEASES.md chore: updates to release_checklist.md (#7817) 2025-04-04 03:45:36 +00:00

README.md

This is the repository for Lean 4.

About

Installation

See Install Lean.

Contributing

Please read our Contribution Guidelines first.

Building from Source

See Building Lean.