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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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Scott Morrison c9f27c36a0
chore: upstream false_or_by_contra tactic (#3363) 
Changes the goal to `False`, retaining as much information as possible:

* If the goal is `False`, do nothing.
* If the goal is an implication or a function type, introduce the
argument and restart.
  (In particular, if the goal is `x ≠ y`, introduce `x = y`.)
* Otherwise, for a propositional goal `P`, replace it with `¬ ¬ P`
(attempting to find a `Decidable` instance, but otherwise falling back
to working classically)
  and introduce `¬ P`.
* For a non-propositional goal use `False.elim`.
2024-02-16 03:58:10 +00:00
.github chore: CI: do not fail on broken links (#3238) 2024-02-01 13:40:27 +00:00
doc chore: upstream Std.Logic (#3312) 2024-02-14 09:40:55 +00:00
images
nix chore: set warningAsError in CI only (#3030) 2023-12-06 08:18:39 +00:00
script chore: refactor pr release workflow (#3020) 2023-12-12 00:45:10 +00:00
src chore: upstream false_or_by_contra tactic (#3363) 2024-02-16 03:58:10 +00:00
stage0 chore: update stage0 2024-02-15 12:32:00 +00:00
tests chore: upstream Option material from Std (#3356) 2024-02-16 02:05:18 +00:00
.gitattributes chore: Do not hide stage0/src/stdlib_flags.h from diffs 2023-09-13 19:29:25 +02:00
.gitignore chore: update tests to account for .lake 2023-11-13 20:31:24 -05:00
.ignore chore: ignore stage0/ (for rg etc.) 2022-03-18 15:28:20 +01:00
CMakeLists.txt feat: embed and check githash in .olean (#2766) 2023-11-27 10:24:43 +00:00
CODEOWNERS doc: add Kyle Miller as delaborator code owner 2024-02-15 17:42:57 +01:00
CONTRIBUTING.md doc: Adjust contributor's docs to squash merging (#2927) 2023-11-21 10:13:43 +00:00
default.nix doc: setup 2021-01-03 13:21:58 +01:00
flake.lock chore: Nix bump to LLVM 15 2023-07-28 10:56:54 +02:00
flake.nix chore: Nix: use strings instead of URL literals (#2172) 2023-03-28 10:10:24 +02:00
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 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README.md doc: remove nightly and other outdated references (#3027) 2024-01-25 13:53:36 +00:00
RELEASES.md feat: have pp.proofs use ⋯ for omission (#3241) 2024-02-15 21:49:41 +00:00
shell.nix chore: Nix bump to LLVM 15 2023-07-28 10:56:54 +02:00

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.