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Author SHA1 Message Date
Leonardo de Moura
e02a140080
feat: @[instance_reducible] part 2 (#12263) 
This PR implements the second part of #12247.

---------

Co-authored-by: Sebastian Ullrich <sebasti@nullri.ch>
 2026-02-03 04:01:13 +00:00
Alok Singh
4c360d50fa
style: fix typos in Init/ and Std/ docstrings (#11864) 
Typos in `Init/` and `Std/`.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

---------

Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>
 2026-01-09 07:24:07 +00:00
Kim Morrison
fd4ff1f7e2
feat: grind_pattern for Exists.choose_spec (#11316) 
This PR adds `grind_pattern Exists.choose_spec => P.choose`.
 2025-11-22 02:19:00 +00:00
Kim Morrison
4887eeb77c
chore: remove >6 month old deprecations (#10968) 2025-10-26 10:01:30 +00:00
Sebastian Ullrich
d17160518c
chore: module system fixes and refinements from Mathlib porting (#10643) 2025-10-02 08:28:08 +00:00
Sebastian Ullrich
09a5b34931
feat: make private the default in module (#9044) 
This PR adjusts the experimental module system to make `private` the
default visibility modifier in `module`s, introducing `public` as a new
modifier instead. `public section` can be used to revert the default for
an entire section, though this is more intended to ease gradual adoption
of the new semantics such as in `Init` (and soon `Std`) where they
should be replaced by a future decl-by-decl re-review of visibilities.
 2025-06-28 16:30:53 +00:00
Joachim Breitner
be80a23281
chore: remove unused simp args (#8905) 
This PR uses the linter from
https://github.com/leanprover/lean4/pull/8901 to clean up simp
arguments.
 2025-06-20 22:34:30 +00:00
Kim Morrison
efe2ab4c04
chore: remove duplicate instances (#8397) 
This PR cleans up many duplicate instances (or, in some cases,
needlessly duplicated `def X := ...; instance Y := X`).
 2025-05-19 04:36:06 +00:00
Sebastian Ullrich
7feb583b9e
feat: enable experimental module system in Init (#8047) 2025-04-23 17:21:33 +00:00
Kim Morrison
ce138e1cec
fix: correct names in library lemmas (#7541) 
This PR corrects names of a number of lemmas, where the incorrect name
was identified automatically by a
[tool](https://leanprover.zulipchat.com/#narrow/channel/270676-lean4/topic/automatic.20spelling.20generation.20.26.20comparison/near/505760384)
written by @Rob23oba.
 2025-03-18 03:50:03 +00:00
Bulhwi Cha
cc76c46244
doc: fix typo (#7067) 2025-02-13 13:21:18 +00:00
Kyle Miller
949feb25a4
chore: move @[simp] from exists_prop' to exists_prop (#5529) 
The lemma `exists_const` already handles all real cases of `(∃ _ : α, p)
↔ p` for general types `α`. If there are no `Nonempty` instances and
this lemma cannot apply, it seems unlikely that simp could make more
progress with `(∃ _ : α, p) ↔ Nonempty α ∧ p`.

However, it is still worth simplifying `(∃ _ : p, q)` to `p ∧ q`.

Also adds a `Nonempty (Decidable a)` instance, which is used by Mathlib.
 2024-10-01 05:38:18 +00:00
euprunin
624f1b9963
chore: fix spelling mistakes in src/Init/ (#5427) 
Co-authored-by: euprunin <euprunin@users.noreply.github.com>
 2024-09-23 21:09:58 +00:00
Kim Morrison
a9e6c41b54
feat: allow simplifying dite_not/decide_not with only Decidable (¬p) (#5263) 
These lemmas are mostly useful for ensuring confluence of `simp`, but
rarely useful in proofs. However they don't seem to have any negative
impact.
 2024-09-09 11:46:20 +00:00
Kim Morrison
d08051cf0b
chore: variables appearing on both sides of an iff should be implicit (#5254) 2024-09-04 08:33:24 +00:00
Sebastian Ullrich
5e313e98d0
doc: Classical.choice (#3871) 
Co-authored-by: Mario Carneiro <di.gama@gmail.com>
 2024-04-22 06:36:56 +00:00
Joe Hendrix
01104cc81e
chore: bool and prop lemmas for Mathlib compatibility and improved confluence (#3508) 
This adds a number of lemmas for simplification of `Bool` and `Prop`
terms. It pulls lemmas from Mathlib and adds additional lemmas where
confluence or consistency suggested they are needed.

It has been tested against Mathlib using some automated test
infrastructure.

That testing module is not yet included in this PR, but will be included
as part of this.

Note. There are currently some comments saying the origin of the simp
rule. These will be removed prior to merging, but are added to clarify
where the rule came from during review.

---------

Co-authored-by: Scott Morrison <scott.morrison@gmail.com>
 2024-03-04 23:56:30 +00:00
Joe Hendrix
8b0dd2e835
chore: upstream Std.Logic (#3312) 
This will collect definitions from Std.Logic

---------

Co-authored-by: David Thrane Christiansen <david@davidchristiansen.dk>
Co-authored-by: Scott Morrison <scott.morrison@gmail.com>
 2024-02-14 09:40:55 +00:00
Leonardo de Moura
cd4c7e4c35 refactor: move by_cases to Init/Classical.lean 2024-02-09 09:57:57 +11:00
Hunter Monroe
62c3e56247
doc: Bold "Diaconescu's theorem" (#3086) 2023-12-17 19:10:35 +00:00
Mario Carneiro
d3a30869c7 fix: spacing in by_cases 2022-11-16 08:16:42 -08:00
Sebastian Ullrich
5160cb7b0f refactor: remove some unnecessary antiquotation kind annotations 2022-07-23 17:09:32 +02:00
Mario Carneiro
f6211b1a74
chore: convert doc/mod comments from /- to /--//-! (#1354) 2022-07-22 12:05:31 -07:00
Leonardo de Moura
041827bed5 chore: unused variables 2022-06-07 17:54:10 -07:00
Sebastian Ullrich
ae7b895f7a refactor: unname some unused variables 2022-06-07 16:37:45 -07:00
Leonardo de Moura
16523647b8 doc: add doc strings to some tactics 2022-04-05 06:27:09 -07:00
Leonardo de Moura
e058fe65a9 feat: make the hypothesis name optional in the by_cases tactic 2022-04-01 19:36:13 -07:00
Leonardo de Moura
712d6726e4 feat: rename tactic byCases => by_cases 2022-02-10 17:11:07 -08:00
Leonardo de Moura
bac91b9b5b chore: remove arbitrary 2022-01-15 12:14:27 -08:00
Leonardo de Moura
83b69bc340 refactor: move Classical.choice and Nonempty to Prelude 2022-01-14 15:59:11 -08:00
Leonardo de Moura
1576040c87 chore: remove workaround 2021-09-09 19:30:31 -07:00
Leonardo de Moura
f5a4b30d5f fix: broken proof 2021-09-09 18:11:05 -07:00
Leonardo de Moura
ad539a23e1 chore: cleanup proofs for tutorial 2021-08-31 16:37:40 -07:00
Leonardo de Moura
a821dcbff2 chore: enforce naming convention for theorems 
see issue #402

fix: `ElabTerm.lean`
 2021-08-07 12:48:38 -07:00
Leonardo de Moura
f4a7ffd8c8 chore: fix codebase and tests 2021-06-29 17:14:52 -07:00
Sebastian Ullrich
a02c6fd3eb chore: adapt stdlib & tests 2021-05-20 15:17:36 -07:00
Leonardo de Moura
51e7f45af2 refactor: cases 
remove dead `induction/cases` code
 2021-03-07 12:37:02 -08:00
Leonardo de Moura
79a4aebf96 feat: add byCases tactic 2021-02-17 13:03:24 -08:00
Leonardo de Moura
7723953188 chore: use instance (priority := <prio>) 2020-12-21 10:17:54 -08:00
Leonardo de Moura
a4901f131b feat: mark propDecidable as a scoped instance 2020-12-16 10:45:49 -08:00
Leonardo de Moura
f33473a39e chore: use exists notation 2020-12-05 16:50:01 -08:00
Leonardo de Moura
b72a3c69b6 fix: ambiguity at induction/cases 
See efc3a320fe
 2020-11-24 14:59:12 -08:00
Leonardo de Moura
304c80d610 feat: use <| 2020-11-19 09:03:38 -08:00
Leonardo de Moura
c665d5e20a chore: cleanup 2020-11-10 15:40:00 -08:00
Leonardo de Moura
7f364feeb5 chore: add Classical.lean, Equivalence, and cleanup 2020-11-10 14:55:34 -08:00