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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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Markus Himmel 8a9cb6def0
feat: Slice.posGE and Slice.posGT (#12301) 
This PR introduces the functions `(String|Slice).posGE` and
`(String|Slice).posGT` will full verification and deprecates
`Slice.findNextPos` in favor of `Slice.posGT`.

The KMP implementation is adapted to use these two new functions.

Various useful string and order lemmas are added along the way.

Also add a `simp` attribute to `Std.le_refl` and fix the resulting
fallout (yes, this would have been better as a separate PR).
2026-02-04 09:45:44 +00:00
.claude doc: add changelog label instructions to CLAUDE.md (#12227) 2026-01-29 03:24:23 +00:00
.github chore: CI: bump actions/cache from 4 to 5 (#11862) 2026-02-03 12:37:56 +00:00
doc doc: clarify release notes title format requirements (#12182) 2026-01-27 08:08:47 +00:00
images chore(CMakeLists.txt): move Lean logo to make sure we can test leanemacs without installing Lean 2015-01-31 17:38:49 -08:00
releases_drafts chore: add release draft for the module system (#11359) 2025-11-26 15:01:07 +00:00
script chore: reformat all cmake files (#12218) 2026-01-28 18:23:08 +00:00
src feat: Slice.posGE and Slice.posGT (#12301) 2026-02-04 09:45:44 +00:00
stage0 chore: update stage0 2026-02-03 23:07:52 +00:00
tests refactor: port push_proj to LCNF (#12294) 2026-02-03 19:21:45 +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 chore: ignore stage0/ (for rg etc.) 2022-03-18 15:28:20 +01:00
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: robustify Nix shell (#8141) 2025-04-28 15:08:32 +00:00
flake.nix chore: use lld if available for building core (#10694) 2025-10-08 16:47:30 +00:00
lean-toolchain doc: VS Code dev setup (#2961) 2023-11-30 08:35:03 +00:00
lean.code-workspace chore: lean.code-workspace: fix terminal cwd (#10802) 2025-10-16 20:19:12 +00:00
LICENSE chore: remove LICENSE header that confused GitHub 2021-11-18 09:42:35 +01:00
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

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See Install Lean.

Contributing

Please read our Contribution Guidelines first.

Building from Source

See Building Lean.