Zulip Chat Archive
Stream: general
Topic: a typo in Theorem Proving in Lean 4
Stepan Holub (Jul 14 2024 at 09:56):
I believe, in Theorem Proving in Lean 4, there is a small but unpleasant (especially for the beginner at this stage) typo:
Incidentally, just as
Falsehas only an elimination rule,Truehas only an introduction rule,True.intro : true. In other words,Trueis simply true, and has a canonical proof,True.intro.
It should be True.intro : True (capital T).
(BTW, what is the preferred way for this kind of proof-reading message?)
Kevin Buzzard (Jul 14 2024 at 10:01):
Just make a PR to the book! It's at https://github.com/leanprover/theorem_proving_in_lean4 . They'll be grateful.
Stepan Holub (Jul 15 2024 at 08:45):
Done. Thanks.
Albert Atserias (May 07 2025 at 06:49):
I have some (small/minor) comments on Theorem Proving in Lean 4 here https://lean-lang.org/theorem_proving_in_lean4/ . Who should I send them to?
Oliver Nash (May 07 2025 at 08:55):
@Albert Atserias Depending on the comments, you could just open a PR to the repo: https://github.com/leanprover/theorem_proving_in_lean4
Last updated: Dec 20 2025 at 21:32 UTC