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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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Kyle Miller 18b183f62b
feat: let induction take zero alteratives (#6486) 
This PR modifies the `induction`/`cases` syntax so that the `with`
clause does not need to be followed by any alternatives. This improves
friendliness of these tactics, since this lets them surface the names of
the missing alternatives:
```lean
example (n : Nat) : True := by
  induction n with
/-            ~~~~
alternative 'zero' has not been provided
alternative 'succ' has not been provided
-/
```

Related to issue #3555
2025-01-08 02:25:21 +00:00
.github chore: temporarily disable Web Assembly build in CI (#6424) 2024-12-20 08:58:10 +00:00
doc feat: release checklist script (#6542) 2025-01-06 06:37:01 +00:00
images
nix feat: add date and time functionality (#4904) 2024-11-14 14:04:19 +00:00
releases_drafts chore: cherry-pick release notes from releases/v4.15.0 and releases/v4.16.0 (#6520) 2025-01-04 01:25:33 +00:00
script fix: set absolute linker path (#6547) 2025-01-07 14:06:24 +00:00
src feat: let induction take zero alteratives (#6486) 2025-01-08 02:25:21 +00:00
stage0 chore: update stage0 2025-01-02 12:29:37 +00:00
tests feat: let induction take zero alteratives (#6486) 2025-01-08 02:25:21 +00:00
.gitattributes
.gitignore feat: support Lake for building Lean core oleans (#3886) 2024-06-13 16:18:24 +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 feat: import LeanSAT's tactic frontends 2024-08-28 18:14:39 +02:00
CMakePresets.json chore: modernize build instructions (#4032) 2024-05-23 10:55:07 +00:00
CODEOWNERS chore: adjust CODEOWNERS (#6327) 2024-12-10 08:37:20 +00:00
CONTRIBUTING.md doc: triage 2024-07-26 18:24:06 +02:00
flake.lock feat: ship cadical (#4325) 2024-08-23 09:13:27 +00:00
flake.nix chore: CI: build 64-bit platforms consistently with GMP 2024-11-01 22:48:49 +11:00
lean-toolchain doc: VS Code dev setup (#2961) 2023-11-30 08:35:03 +00:00
lean.code-workspace chore: add the lean4 extension to the vscode workspace (#3059) 2023-12-14 08:58:21 +00:00
LICENSE
LICENSES feat: ship cadical (#4325) 2024-08-23 09:13:27 +00:00
README.md chore: update documentation title and link README to reference (#6409) 2024-12-17 22:18:56 +00:00
RELEASES.md doc: fix broken code blocks in RELEASES.md (#6527) 2025-01-04 08:08:12 +00:00

README.md

This is the repository for Lean 4.

About

Installation

See Setting Up Lean.

Contributing

Please read our Contribution Guidelines first.

Building from Source

See Building Lean (documentation source: doc/make/index.md).