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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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Leonardo de Moura 9fe0d28107 fix: do not split on if-then-else terms when generating equation theorems 
Reason: avoid unnecessary case-analysis explosion
It is also unnecessary since we only refine the `below` and `F`
arguments over `match`-expressions.

This fixes the last case at issue #998
```
attribute [simp] BinaryHeap.heapifyDown
```

closes #998
2022-02-09 17:43:35 -08:00
.github chore: fix changelog path... 2022-02-09 09:42:17 +01:00
.vscode doc: fix some syntax and link in the docs, and more 2021-10-10 11:36:43 +02:00
doc doc: document some do block patterns/sugar 2022-02-07 20:50:15 +01:00
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
nix test: reimplement package tests using Lake 2022-02-09 12:21:11 -08:00
script fix: Windows: do not use standard sysroot 2022-01-30 17:43:14 +01:00
src fix: do not split on if-then-else terms when generating equation theorems 2022-02-09 17:43:35 -08:00
stage0 chore: update stage0 2022-02-07 13:19:52 -08:00
tests fix: do not split on if-then-else terms when generating equation theorems 2022-02-09 17:43:35 -08:00
.gitattributes chore: fix changelog path... 2022-02-09 09:42:17 +01:00
.gitignore fix: UTF-8 file path support for lean on Windows 2021-09-22 12:21:52 +02:00
.gitmodules chore: add ignore = untracked 2021-10-18 14:39:43 -07:00
CMakeLists.txt fix: forward USE_GMP to stage 0 2021-12-02 15:52:48 +01:00
CONTRIBUTING.md doc: fix a few links 2021-11-09 09:55:11 +01:00
default.nix doc: setup 2021-01-03 13:21:58 +01:00
flake.lock chore: move out lean4-mode 2022-01-24 21:23:53 +01:00
flake.nix chore: move out lean4-mode 2022-01-24 21:23:53 +01:00
LICENSE chore: remove LICENSE header that confused GitHub 2021-11-18 09:42:35 +01:00
LICENSES chore: add GMP license for now 2021-11-18 09:42:35 +01:00
README.md chore: add link to "Theorem Proving in Lean 4" tutorial 2021-09-01 10:44:43 -07:00
RELEASES.md feat: improve contradiction 2022-02-08 13:26:05 -08:00
shell.nix chore: CI: put llvm-symbolizer in PATH for asan/lsan backtraces 2022-01-10 18:35:22 +01:00

README.md

This is the repository for Lean 4, which is currently being released as milestone releases towards a first stable release. Lean 3 is still the latest stable release.

About

Installation

See Setting Up Lean.

Contributing

Please read our Contribution Guidelines first.

Building from Source

See Building Lean.